Is there any tool or method to define beforehand the maximum area of each drawn polygon class ? Polygons are going to be distributed according to my idea so I need to have control over the process. I can imagine it the way that while drawing polygons I am not able to exceed the previously defined threshold value.
I started doing it manually (had to create patches of tree species of exact total size in ha) and was checking the total size in a table of attributes but I believe there is a way to do it in more comfortable and precise way.