You need to select type Text in custom fields. And min-width (pixel).
UpDiagram provides multiple filters, for instance, Bold, Italic, Underline, and Strike,... suitable for many purposes.
You will have 2 ways to enter text.
- If in Grid View you just need to click on the task to enter.
- If you open the popup detail, you need to find the field that is set up text and enter the data.