What is this called in MS' terminology: I would call it a text box or an input box. I'm having zero luck searching using those terms. I do find various articles on Office support that describe text ...

The Bullet feature is not available in Microsoft Excel by default; you must go to settings to have it enabled. The bullet feature cannot add bullets to cells in your Excel spreadsheet, but it can add ...

In Microsoft Word or Excel, we can insert a pre-formatted text box or draw a text box as well as resize it to put and type text anywhere in a document or sheet. However, some users have complained ...