Each tab (5) represents a category. Useless to develop more, on this, the names of the categories are quite representative.
The operation is simple, just drag and drop the desired pictogram into the desired (Directions) box. If you want to shift the images of a line following an error, activate the RdP (Rearrange Pictograms) mode. This option appears when you click on the + at the top left of the page.
Again, it's very simple. To delete a pictogram from the roadbook, simply double-click it.