1) you can press "home" in each view and it will take you back to the default. You could also delete the .hps (head position settings) from the game folder and it will re d/l the defaults.
2) on the clipboard map,if you right click you'll get a pop out menu with various options, click on the "clipboard maps" and it will list various bases and the layouts. You can also save and print them out.
2a) As for using the bombsight mode, it's all about calibrating the drop to speed and being at that speed for the optimal accuracy.
2a1) As for objects and how much ordnance it takes to destroy them, again, on the clipboard map and options/arena set up/objects/objects settings and it will show you hardness as a percent of 1,000 lbs... for example the vehicle hangar (and all hangars actually) take 2.78k lbs of ord to destroy. Ammo, radar, barracks take 310lbs... etc.
Here's a website that explains bombing and stuff...and covers in detail what was mentioned above.
https://arlogu3.wixsite.com/ah-level-bombing/copy-of-level-bombing
