LIMA Documentation

LIMA Documentation

Table of Contents

  1. Overview
  2. Features
  3. Installation
  4. Quick Start
  5. Available Tools & Commands
  6. Keyboard Shortcuts
  7. Support

Overview

Welcome to LIMA - Low-Vision Intelligent Machine Assistant

LIMA is a Windows-based screen reader that provides complete computer control through voice commands. Designed specifically for blind and low-vision users, LIMA combines artificial intelligence with natural voice interaction to improve computer accessability.

What LIMA Does:

  • Understands natural voice commands OR typed text and performs computer tasks automatically
  • Reads and describes what's on your screen using AI vision
  • Controls your mouse, keyboard, and applications through voice or text input
  • Supports English and Vietnamese languages
  • Provides real-time conversational interaction with AI understanding

How LIMA Fills Gaps with Existing Screen Readers

The Problem with Traditional Screen Readers

Traditional screen readers like NVDA and JAWS require:

  • Manual navigation: Users must manually navigate every element on screen
  • Steep learning curve: Complex keyboard shortcuts and commands to memorize
  • Limited conversation: No natural language understanding; commands must be exact
  • Website developer support: Many websites are missing alt text and image descriptions

How LIMA is Different

LIMA bridges these gaps by offering:

Natural Language Understanding

  • Say exactly what you want using conversational language
  • No need to memorize complex keyboard shortcuts
  • LIMA understands context and intent, not just exact commands

AI-Powered Screen Comprehension

  • Automatically analyzes and describes what's on screen
  • Understands layout and relationships between elements

Flexible Input

  • Use voice OR type commands - whatever works best for you
  • Switch between input methods seamlessly

For Accessibility

  • Designed specifically for users with visual impairments
  • Takes accessibility as a core principle, not an afterthought

Features

Voice Control

Control everything on your computer using natural language:

  • Basic Actions: "Open Chrome", "Click save", "Type hello world"
  • Application Management: "Launch Chrome", "Close this window"
  • Web Browsing: "Search Google for weather", "Click the first result", "Scroll down"
  • File Management: "Open Documents", "Create new file", "Delete that file"

Screen Reading & Observation

Get instant understanding of what's displaying:

  • Real-time descriptions of your screen
  • Identification of clickable elements (buttons, links, menus)
  • Text reading and element detection
  • Understanding of layout and structure

Computer Automation

Perform complex tasks with simple voice commands:

  • Mouse clicks and keyboard input
  • Application launching and control
  • Web searches and navigation

Dual Input Methods

Choose the easiest way for you to interact with LIMA:

  • Voice Commands: Speak naturally and conversationally
  • Text Input: Type commands directly using the text input widget at the bottom of the window
  • Hybrid Approach: Mix voice and text as needed for your workflow

Supported Languages

Full support for English and Vietnamese with complete voice recognition, text-to-speech, and interface translation.

Installation

System Requirements

Recommended:

  • Windows 11 (64-bit)
  • 8GB RAM
  • 2.5GHz quad-core processor
  • 1920x1080 display resolution (1280x1024 minimum)
  • High-speed internet
  • Quality microphone and headphones
  • Single monitor setup (optimal performance)
  • NVDA (for fully blind users)

Installation Steps

  1. Download the LIMA installer from your email
  2. Run the installer as administrator
  3. Select your preferred language
  4. Accept the license agreement
  5. Enter your license key
  6. Choose installation location
  7. Complete the setup wizard

Initial Setup

After installation:

  • Double click to launch LIMA
  • Lima will provide you with a screen description
  • You can now ask LIMA questions or complete actions.
  • Configure settings to your preference

Quick Start

Getting Started in 5 Steps

  1. Launch LIMA - Open the application
  2. Try Basic Commands - Say "Hello LIMA", "Describe the screen", "Open Notepad"
  3. Practice Common Tasks - Web browsing, application launching, text input
  4. Explore Settings - Customize language, audio, and accessibility features

Voice Command Tips

  • Speak clearly at a moderate pace
  • Use natural, conversational language
  • Be specific but not robotic ("Open the Documents folder" works better than "Open Documents")
  • Press Ctrl + Alt + K to interrupt talking
  • Use text input if voice isn't working (bottom of window)

Understanding the Interface

  • Status Icon - Shows if LIMA is listening, thinking, or speaking
  • Transcript Area - Displays your words and LIMA's responses
  • Microphone Control - Mute/unmute button with sensitivity adjustment
  • Settings - Access your system microphone settings

Available Tools & Commands

LIMA can call the following tools through voice commands. These are the core functions available to you:

Screen Observation

Observation tool

  • Observe and describe what's currently on your screen
  • Ask questions about the screen content
  • Example: "What's on the screen?", "Describe the current window", "What buttons are visible?"

Mouse & Pointer Control

Mouse click

  • Perform a mouse click (left, right, or double-click) at the current cursor position or at specific coordinates
  • Example: "Left click", "Right click", "Double click", "Click on the text input box"

Move mouse to

  • Move the mouse pointer to specific x,y coordinates
  • Example: "Move mouse to the ok button"

Mouse wheel scroll

  • Scroll the mouse wheel up or down
  • Example: "Scroll up", "Scroll down"

Keyboard Input

Type text

  • Type any text without pressing Enter
  • Example: "Type hello world", "Type my email address"

Type text and enter

  • Type text and automatically press Enter
  • Useful for commands and form submissions
  • Example: "Type my password and enter"

Press key

  • Press a single keyboard key: Enter, Backspace, or Arrow keys (up, down, left, right)
  • Example: "Press enter", "Press backspace", "Press arrow down", "Press arrow right"

System & Window Control

Windows key

  • Open or close the Windows Start menu
  • Example: "Press Windows key", "Open start menu"

Show desktop

  • Show or hide the windows desktop (Windows+D)
  • Example: "Show desktop", "Go to desktop"

Window control

  • Maximize or minimize the currently focused window
  • Example: "Maximize this window", "Minimize this window"

Application Control

Open program

  • Launch installed applications
  • Example: "Open Chrome", "Open Notepad", "Open File Explorer"

Open website

  • Open a website in your default browser
  • Example: "Open wikipedia.org", "Go to google.com"

Voice Control

Voice control tool

  • Adjust LIMA's text-to-speech output: volume, speed, and voice
  • Example: "Talk faster", "Talk slower", "Speak louder", "Change voice"
  • Available voices: Despina (Chill Young Female), Enceladus (Chill Middle-Aged Male), Rasalgethi (Chill Young Male), Laomedeia (Professional Woman)

Information & Search

Web search

  • Search the web for information, news, weather, stock prices, etc.
  • Example: "Search for weather in Sydney", "What's the stock price for Apple?", "Find latest news"

Memory (Advanced)

Create Memory

  • Save information to memory for use in future sessions
  • Useful for remembering file locations or important details
  • Example: "Remember that my files are in C:\Users\Documents"

Keyboard Shortcuts

Quick keyboard shortcuts you can use. All shortcuts can be customized in Settings → Hotkeys:

Shortcut Action
Ctrl+Alt+J - Stop LIMA from speaking (interrupt speech)
Ctrl+Alt+K - Instantly describe what's on screen
Ctrl+Alt+H - Open a popup text input box

Settings

LIMA provides a variety of configurable settings to customize your experience. Access Settings from the main window.

Voice Settings

  • Voice Selection - Choose from available TTS voices: Despina (Chill Young Female), Enceladus (Chill Middle-Aged Male), Rasalgethi (Chill Young Male), Laomedeia (Professional Woman)
  • Speaking Rate - Adjust how fast LIMA speaks (slow, medium, fast)
  • TTS Mode - Choose between online (cloud-based) or offline TTS

Hotkey Configuration

  • Stop Speech Hotkey - Customize the key combination to interrupt LIMA's speech (default: Ctrl+Alt+J)
  • Observe Screen Hotkey - Customize the key combination to trigger screen observation (default: Ctrl+Alt+K)
  • Quick Input Hotkey - Customize the key combination to open the text input popup (default: Ctrl+Alt+H)

Speech Detection

  • End-Turn Confidence Threshold - Adjust how LIMA detects when you've finished speaking. Lower values make LIMA respond faster but may cut off speech; higher values wait longer for more natural conversation flow
  • Microphone Sensitivity - Adjust microphone input sensitivity

AI Model Selection

  • Base AI Model - Choose the AI model for LIMA's responses. Available models include GPT-5.2, Llama 4 Maverick, and Kimi K2.5

Narration Settings

  • Website Narration Verbosity - Control how detailed website descriptions are (regular or detailed)
  • Video Narration Verbosity - Control how detailed video descriptions are (regular or detailed)

Appearance

  • Text Size - Adjust the transcript text size for better readability
  • Theme - Choose between available visual themes
  • Language - Select interface language (English or Vietnamese)

Support

Common Issues & Solutions

LIMA Won't Start

  • Verify Windows 10/11 (64-bit) is installed
  • Run the application as administrator
  • Check that your license is activated
  • Restart your computer

Voice Recognition Problems

  • Check microphone is properly connected
  • Test microphone in other applications
  • Reduce background noise
  • Adjust microphone sensitivity in Settings → Audio

Slow Performance

  • Close unnecessary applications
  • Check your internet connection
  • Verify your system meets minimum requirements
  • Restart LIMA

Audio or Speaker Issues

  • Verify speakers/headphones are connected
  • Check that volume is not muted
  • Test audio in other applications
  • Update audio drivers

Failed to Initialize/ DVS worker crashed

  • Restart LIMA

Getting Help

If you need assistance:

Email Support

  • General inquiries: hello@roscommon.systems

Response Time

  • Email: 24-hour response
  • Phone: Available Monday-Friday, 11 AM - 7 PM AEST

About LIMA

LIMA is developed by Roscommon Systems Pty. Ltd., an Australian company dedicated to making technology genuinely accessible for blind and low-vision users worldwide.

Mission: Empower individuals with visual impairments through innovative technology that provides true computer independence.

License: Copyright © 2026 Roscommon Systems Pty. Ltd. - All Rights Reserved

For more information, visit www.roscommon.systems

Download LIMA (requires activation key)