Memo paragraphs can have user-defined Tab stops. The way it works is rather similar to most common word processors. You can set Tab stops by clicking on the Ruler with the mouse. You can move Tab stops by dragging them along the Ruler. You can delete them by dragging them away from the Ruler. However, the Ruler only allows you to create the most common kind of Tab stop: the Left-aligned kind. If you need other kinds of Tabs or you want to specify their positioning numerically, you need the Tabs dropdown dialog.

First, a little note. While it looks like an InstaButton dropdown dialog and in many ways functions like the rest of them, the Tabs button is not an InstaButton. It does not apply anything when you click on it (just opens the dialog), does not remember its "personal" settings, and it therefore doesn't make any sense to have more than one.

Every paragraph in a Memo starts out with Default Tab Stops. This is a single value that applies to the entire Memo – not to any particular paragraph. It will usually be equal to 1/2 inch or 1.27 centimeters, depending on your unit of choice. Unless you change it to something else, and the Tabs dialog is where you do so.

The Units radio group allows you to change the current Memo's units to either inches or centimeters. This will only affect the current Memo, and will only remain in effect until its InfoView is closed. To make all newly-opened Memos default to a particular unit, you'd set your preference in the Settings form.

The toggle button with an End-of-Paragraph mark in the top/right corner is the Show Special Symbols button. Depress it to make the current Memo display Tabs, Spaces, and End-of-Paragraph marks. Can be useful while playing with Tabs.

We now get to the most interesting part of the Tabs dialog: the Tab List. This is where all user-defined Tab stops are listed. You can manipulate existing Tabs by changing their Position, Leading (what line (none, dotted, underline, dashed) leads to the text aligned at this tab stop), and Alignment (Left/Center/Right – how the text is positioned relative to this tab stop). You can delete existing Tabs by deleting the corresponding record in the list (just hit Delete or Ctrl-Delete). You can create new Tabs by inserting new records in the list (hit Insert when not inside a cell of an existing Tab record, if any. Hit Enter to get out of the cell if necessary).