I've got one polygon layer containing a lot of polygons (Layer 1 - red polygons) and a second layer with one polygon (Layer 2 - green area).
Now I want to select all polygons from Layer 1 which intersect/lie within the green polygon from Layer 2. I DON'T want to have a new TEMP layer containing the result of intersection - I rather want to have the polygons from layer 1 selected (or marked ... or whatever is possible) in order to assign a property to the affected polygons ....
In other words: I want to assign to all affected red polygons the property: "Lies (partyl) within green area" ...
How to do this within QGIS?