Select if you want to add Icon support to the listbox display.  You can add transparent Icon support with the checkbox.

Select a default Icon for the first cell in a booking.  If you want another icon to indicate a duration cell, check the box and pick an icon for that.

Check the box if you want to use the same Icon for Duration as primary cell.  This is usually used along with the conditional icons.

'Use Conditional Icons' will replace the Default icon in the first cell of a booking with another icon depending on your selections in the 2 following Buttons.

"Case" Structure Icons

"Case" Structure icons will change the icon of the displayed booking depending on the value stored in a field that you select in the Field with Condition prompt.  You can have as many as you need.  The template does a case statement on the field and uses UPPER and CLIP so it is not case sensitive and ignores trailing spaces.

Then click on insert to add your conditions.

Add the Conditional text without quotes to evaluate against in the Field.

The template does a case statement on the field and uses UPPER and CLIP so it is not case sensitive and ignores trailing spaces.

Select the Icon that will be used if the Data evaluates to true.

"If" Structure Icons

Click insert to add your options.

The template will generate "IF" statements using your conditions.  You need to have the variables and quotes right on these.

"IF" condition is an Expression prompt, so you can look up the variables with the button.