Editing Text Attributes
Recall that text attributes require that you choose from a well-defined set of legal values. Text attributes utilize single- and multi-valued drop-down lists and drop-down trees.
To edit a single-valued text attribute:
...
1. Double-click in the applicable field or attribute or click on the down triangle to open the drop-down control (figure below).

2. Select a single item from the drop-down list.
3. Press Enter or click on the up triangle to close the drop-down control.
To add or remove items for a multi-valued text attribute:
...
1. Double-click in the applicable field or attribute or click on the down triangle to open the drop-down control (figure below).

2. Select or deselect items from the drop-down list, as follows:
○ To add Available list item(s) to the Selected list, highlight them and click the Add button.
○ To remove items from the Selected list, highlight them and click the Remove button.
○ To add all of the items to the Selected list, click All.
○ To remove all of the items from the Selected list, click None.
3. Press Enter or click on the up triangle to close the drop-down control.