The content of the Properties palette varies according to the situation. If a tool is active, or one or more elements of the same type are selected, the at the top of the palette identifies the currently selected family type.
Immediately below the Type Selector is a filter that identifies the category of the elements a tool will place, or the category and number of elements selected in the drawing area. If multiple categories or types are selected, only the instance properties common to all display on the palette. When multiple categories are selected, use the filter’s drop-down to view the properties for a specific category.
The Properties palette displays both user-editable and read-only properties. To modify a user-editable property value, click it and either enter a new value, select one from a drop-down list, or select/clear a check box. For some properties, the value box contains a button that opens a dialog or browser window in which you define the desired value.
If making multiple changes, you can press Tab to move from one property to the next, or just click the next one you want to change. You can then use any of the methods listed above to commit all your changes at once.