Introduction

Lemma is a note-taking app for the Linux desktop, with some special features:

• •
  A custom-made text editor allows for beautiful typography.
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  It uses a variant of Computer Modern, a font that some will know from TeX and LaTeX.
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  Easy entry of special characters is build in, which is useful for taking notes about math.
• •
  It is easy to add links to other documents and the web.

Last but not least it is Free Software licensed under GPL version 3 or later. See the COPYING file for details.

Organisation

This book is intended as complete guide to Lemma, showing its various features and even how it works internally. It is currently far from complete. The first chapters will explain basic use of the system. Next will be customizing the user interface. The final chapters will explain the architecture of the software itself. Those would mostly be useful for developers who want to build extensions or who want to help development of the core system, or maybe just curious people.

Notation

Symbols like ≡ and labels like Settings stand for buttons in the Lemma user interface. ≡ ⇢ Settings means click on ≡, then click on Settings.

Symbols like ctrl or f stand for keypresses. ab means first type a, then type b. ctrl+f means press and hold ctrl, then press f.