What is the rich text editor?
In addition to plain text files (.txt), TextTree includes a rich text editor for formatted documents. Any file with the .tt.html extension opens in this editor.
You can apply headings, bold, bullet lists, text colors, background colors, and embedded images — all preserved in a self-contained file that external apps see as *.html, so it also opens correctly in any browser.
When is it useful?
Use it when plain text is not enough to express what you need.
- Project overview docs — structured with headings and lists, key points highlighted
- Scrap collection notes — paste copied content and color-code it by topic
- Image-annotated memos — paste a screenshot with Ctrl+V and write alongside it
- Reports and summaries — headings, bold, and lists make documents easy to read
Store .tt.html files in the same folder as your text files and manage them together in the tree.
Formatting features
The toolbar provides the following formatting options.
| Button | Function |
|---|---|
| H1 / H2 / H3 | Switch heading size |
| B | Bold |
| I | Italic |
| U | Underline |
| • List | Bullet list |
| 1. List | Numbered list |
| A (text color) | Change text color of selection |
| HL (highlight) | Change background color of selection |
| BG (background) | Set the page background color |
| txt | Remove all formatting and return to plain text |
Keyboard shortcuts also work: Ctrl+B for bold, Ctrl+I for italic, Ctrl+U for underline.
Embedding images
Paste an image from your clipboard with Ctrl+V and it will be embedded directly in the document. Images are stored as Base64 inside the file, so the document stays self-contained wherever you move it.
Drag the ● handle on the right edge of an image to resize it. Double-click to reset to the original size.
Setting page background color
The BG button lets you set a background color for the entire page. When you use multiple .tt.html files in a folder, different background colors help you tell them apart at a glance.
Creating a .tt.html file
Right-click a folder in the tree → “New file” → name the file with .tt.html at the end (e.g., notes.tt.html). The file will open in the rich text editor.
Search (Ctrl+F)
Press Ctrl+F to open the search bar. Matches are highlighted and you can press Enter to jump to the next one.