The formula list for the current category.  Use keyboard and shift key to select by typing the name of the desired unit or double click on the desired formula.  Shifted arrow keys work also.

The formula categories list.  Use keyboard to select by typing the name of the desired item.  Arrow keys work also.  If editing is enabled, double clicking allows editing of the item.

If editing is enabled (set in the preferences dialog) the current category item may be deleted.

If editing is enabled (set in the preferences dialog) the current category item may be edited.

If editing is enabled (set in the preferences dialog) a new item may be added to the current category list.

This arrow will allow you to view the function(s) associated with the current selection.  Keyboard equivalents are: right arrow key, enter key, return key.

This hilited ICON shows that Functions & Formulas is the current mode.

Select this ICON to view constant and property tables.

Select this ICON to perform unit conversions.

This button will display the “About” dialog.  Same as choosing “About Engineering Assistant…” from the Apple menu.