... be helpful if the most recently created background template was marked in some way. Preferably visible through the control template. It would then be more obvious that the background template exists, and folks would be less likely to store another one. The hatched background idea didn't work out very well. The Windows GDI is fickle about displaying bitmap and pattern fills, they vanish at some zoom settings. And the appearance wasn't very appealing. But this looks promising: The most recently stored background template is drawn with the timbering in bold: 2_051353_540000000.png I've been trying this and it is very handy to have your work progress highlighted in this way on the trackpad. You can easily see where you have got to in the track plan. The difference is quite visible at all zoom levels. But the main reason for it is to provide a very obvious visual change when the control template is stored: 2_051357_050000000.png To me the visual effect is very clearly that the control template is now in front of another template. So hopefully anyone seeing this is unlikely to store it again ...