You are trying to add a free text field (such as Notes from an object) to a table view.
Reproducing the Issue
This is valid for any screen with a table view on it.
1) Navigate to a screen with a table view present;
2) Click in Adapt button;
3) Select Edit Master Layout;
4) Hover your mouse over a table view and click on the plus (+) button;
5) You notice that the Note field does not appear as possibility for adding in the table view.
Data types have different size limits and table views currently do not support this type of information, from Notes for example. Note is a datatype that cannot be showed in these circumstances, because it can hold much information that could compromise its visualization. For example long notes in the mobile version could require a lot of work scrolling down to do a task.
This is a limitation on table views, thus currently the system standard behavior.
KBA , AP-PRO , Project Processing , How To