Hi folks. The SHIFT - Double click idea is in the help but in pieces. In one part it is written that the SHIFT key act as toggle to add/subtract from the selection. In another part it is written that a double click on a face will select the face and its perimeter. In my brain, one idea germinated that I should try both to see if I could add/subtract a face and its perimeter. So, I experimented and discovered that it works You can experiment with all sort of combinations like SHIFT - Window select to add/subtract using a selection window. keep i mind that Window Select left to right is different from right to left. You can also use triple clicks with SHIFT and with CTRL too. This adds a lot of possibilities when selecting geometries. Another trick that may help if you have something really tough to select and are afraid of loosing the selection if you inadvertently click or choose a tool (this kind of mishap happens) is to create a group with an easily selected part of what you want to select. Then, select some more stuff, cut it and paste it in place inside the newly created group. Repeat untill everything you want is inside the group. Then, go inside the group and do what you want to do. Explode the group when done. If all you want is to delete all these objects, simply delete the group. Just ideas.