Rule buttons are displayed for:

•Gutter Rule – adds continuous gutter rules to a box, page or spread avoiding all other items on the page

•Horizontal Rule – adds a continuous horizontal rule to a page avoiding other items on the page

•Rule Off – adds continuous rules to rule off any advertising placed on a page by tracing around the advertising shapes

•Rule Around – adds rules to rule around a single shape or multiply selected shapes by tracing around the selected items

•Extend Selection - If you select a rule and then click the Extend Selection button, the other related rules will be added to the selection. You can then delete them all, or perhaps use other InDesign tools to re-colour them, etc.