The cell editor of a column defines how you enter data in that column.
A cell can always contain text, icons, colour and annotations, regardless of the configured editor.
To keep the list of editors as short as possible, some of the available editors are hidden by default. You can enable/disable editors from the main Menu > Settings > Cell editors, Calculation
You'll find here a comprehensive list of editors
Automatic cell editor
The automatic cell editor adjusts itself to the grade type of each column.
This is the default editor and the recommended one. See below how it works:
How to change the editor of a column
In order to change a single column's editor, double-tap on that column and tap onCell editor
Changing the editor of a column will not change its data
A tap and hold on a cell will always bring the Text/Icons editor on screen
Change the editor for several columns
Tap on Tools (top bar) / Columns / Select your columns an Edit
The animation below shows the steps.
Related articles
The list of available Editors: input marks, scores, grades and icons
Custom editors: Icons