||Document Rulers: Check this if you want your documents to open with the rulers visible. |
Units: The Units menu sets the Ruler, Grid, and size units for new documents. Unit choices are: inches, centimeters, picas, and points. The Units preference can be set here, from the Format menu, and from a document’s Toolbar; the last change entered is used for new documents.
Hide Text Ruler area when not editing: Check this if you want the top ruler to shrink when you’re not editing text.