Liii STEM Quick Start Guide

After completing this tutorial, you will be able to quickly and painlessly edit documents as shown in the figure below.

Note: This tutorial uses the Liii theme for demonstration. You can select the Liii theme in Edit -> Preferences -> User Interface to get the exact same interface as this document.

1 Basic Concepts: Modes and Environments

1.1 Four Types of Toolbars

As shown in the figure below, there are four different toolbars at the top of Liii STEM's interface:

• Menu Bar
• Tab Bar
• Mode Toolbar
• Environment/Focus Toolbar

1.2 Three Main Modes

In Liii STEM, to ensure absolute writing standards, we have established three independent modes with strict distinctions. You need to always be aware of which mode the system is in while writing. The three main modes are:

• Text Mode: Default mode, used for writing and inserting text, images, tables, etc.
• Math Mode: Press $ to enter, used for quick editing of mathematical formulas.
• Command Mode: Press \ to enter, allows input of LaTeX syntax.

The Mode Toolbar and Environment/Focus Toolbar dynamically change based on the system's Mode and Environment.

1.3 Environments

Beneath the three main modes, there is the concept of environments. Environments originally come from $\LaTeX$ and are used to change or limit certain formatting settings to apply only within specific scopes.

• Different modes provide different environments.

For example, in Text Mode we have Title, Section, Enunciation environments; in Math Mode we have Fraction, Square Root environments.

• Different environments have different keyboard shortcuts, editing methods, and even typing the same letter can produce different fonts.

For example, pressing F5 in Text Mode enters the emph environment. In this environment, the font is automatically set to italic.

• You can use the shortcut Ctrl + Backspace to keep the text and exit the current environment, as shown below.

1.4 Sub-environments

Sub-environments represent the specific position where your cursor is located within an environment, or the location you jump to after inserting a sub-environment.

• Some environments provide different sub-environments.
• Different sub-environments have subtle variations in fonts and editing methods.

For example, in the Title Environment in Text Mode, when you click on the Title (one sub-environment) and Author (another sub-environment), the Environment Toolbar changes, and the font in *Author$ is also different.

• In Liii STEM, everything is an environment (sub-environment).
• You can even use Ctrl + Backspace to cancel the parentheses sub-environment in Math Mode, achieving the effect shown in the figure below.

Note: Due to translation and localization reasons, in Liii STEM, environments or sub-environments are sometimes referred to as Focus. However, you don't need to worry about this as long as you understand the basic concepts we've explained above.

1.5 Summary

• The Mode and Environment tools in the toolbar automatically switch based on your current cursor position.
• Different modes display different tool options, ensuring you always see the most relevant functions.
• Press $ to enter Math Mode. For more formula quick editing methods, see Mathematical Formula Quick Editing.
• Use arrow keys to move the cursor and exit environments.

Congratulations! You have now mastered the concepts of modes and environments! This is our biggest difference and highlight compared to other software. The next sections 2-5 will continue to teach you how to insert and use various environments in Text Mode.

2 Title and Abstract Insertion

This section will teach you how to create title effects as shown in the figure below.

• In Text Mode, click Insert → Title to choose to insert Title or Abstract environments.
• You can also use $\LaTeX$-like commands such as $\backslash \texttt{title}$ and $\backslash \texttt{abstract}$.

• Be careful not to insert the Abstract environment inside the Title environment.
• Unlike $\LaTeX$, Liii STEM allows any environment to be nested repeatedly. For beginners, we do not recommend nesting any environments.

• When the cursor is in the Title environment, we can insert different sub-environments. Sub-environments can be inserted by pressing Enter directly, or by manually clicking the icons shown below.

3 Section and Subsection Insertion

This section teaches you how to create documents with clear chapter structures, as shown in the figure below.

• In Text Mode, click Insert → Section to choose to insert different levels of section environments.
• You can also use keyboard shortcuts:
  • Alt/Option+1: Insert Section
  • Alt/Option+2: Insert Subsection
  • Alt/Option+3: Insert Subsubsection
• You can also use $\LaTeX$-like commands such as $\backslash \texttt{section}$, $\backslash \texttt{subsection}$, and $\backslash \texttt{subsubsection}$.

• Similarly, be careful not to write body text inside section environments! We also do not recommend nesting a new Math environment inside section environments (many academic journals and conferences prohibit this).

For more information about sections, such as numbering and abstracts, please refer to Numbered Content Labeling and References.

4 Automatic Content Insertion (Table of Contents and Bibliography)

This section teaches you how to insert automatic content such as table of contents and bibliography, as shown in the figure below.

4.1 Inserting Table of Contents Environment

• In Text Mode, click Insert → Automatic → Table of Contents to insert an automatically generated table of contents.
• You can also use $\LaTeX$-like commands such as $\backslash \texttt{tableofcontents}$.
• If you are using the Liii theme, you can also insert automatic content through the following icon:

• The table of contents is automatically generated based on your document's section and subsection structure. You can refresh all automatic content by going to Document → Update → All.

4.2 Inserting Bibliography Environment

In Text Mode, click Insert → Automatic → Bibliography to insert a bibliography list. We currently only support BibTeX format.

• Note that the bibliography environment is usually placed at the end of the document and should not be nested inside other environments. Also ensure the .bib file path is correct so the system can properly read the literature information.
• You need to use the $\backslash\texttt{cite}$ command to cite references. Uncited references will not be refreshed.

For more detailed tutorials, please visit Bibliography Insertion Tutorial.

Important! Do not manually edit the automatic content in Liii STEM (such as table of contents and bibliography), as this will affect the final generated result.

5 Enunciation Insertion (Definition, Theorem, Proof, etc.)

This section teaches you how to insert enunciations commonly used in mathematical writing, such as theorems, definitions, proofs, etc., as shown in the figure below.

Note: Enunciations are a special type of environment. In Liii STEM, everything is an environment!

• In Text Mode, click Insert → Enunciation to choose to insert different types of enunciation environments.
• You can also use $\LaTeX$-like commands such as $\backslash \texttt{theorem}$, $\backslash \texttt{definition}$, and $\backslash \texttt{proof}$.
• If you are using the Liii theme, you can also insert enunciations through the following icon:

Note that enunciation environments are typically used for academic writing, and each enunciation should contain clear content. The proof environment automatically adds a QED symbol at the end.

Please avoid nesting other enunciations inside enunciation environments, as this may cause numbering and style confusion. As shown in the figure below, when the proof environment is incorrectly nested inside the theorem environment, the font incorrectly becomes italic.

For more detailed usage of enunciations, please refer to Enunciation Tutorial.

6 Magic Paste and AI Automatic Typesetting

This section teaches you how to use Liii STEM's intelligent features, including Magic Paste and AI automatic typesetting to achieve the effects shown in the figure below.

6.1 Magic Paste Function

Directly copy content from web sources such as DeepSeek, ChatGPT, Claude, Zhihu, etc., and use paste (Ctrl/Cmd+V) in Liii STEM to automatically convert the format.

6.2 AI Automatic Typesetting Function

Liii STEM also has built-in AI. You can insert an LLM session as shown in the figure below.

Liii STEM's AI dialog supports all Liii STEM environments, including enunciations, mathematics, etc., as shown in the figure below:

For more detailed usage of Magic Paste, please refer to Magic Paste Tutorial. For detailed configuration and usage of AI functions, please refer to Large Language Model Tutorial.

7 More Detailed Tutorials

There is also a usage tutorial maintained by the Mogan community: Liii STEM Usage Tutorial (Beta).

8 Download Example Documents

You can click the link here to download the example documents for this tutorial for practice: Quick Start Example Document.