[. . . ] Edge Length - If this is selected the length, in Blender units, will be drawn near the center of the selected edge. Edge Angles - If this is selected the angle, in degrees, will drawn near the corner of two selected edges. [. . . ] Face Area - If this is selected the area, in Blender units, will be drawn near the center of the selected face. For each end point in the edge the following operations are performed: • • • It checks to see if it connects to only 3 other edges. If the edge in question has already been added to the list, the selection ends. Of the 3 edges that connect to the current edge, the ones that share a face with the current edge are eliminated and the remaining edge is added to the list and is made the current edge. This way a loop of edges is highlighted (One open (left) and one closed (right) Edgeloop. If you wish to add the highlighted loop to the current selection use SHIFT-LMB, while if you want to subtract the highlighted loop from the current selection use ALT-LMB. If ALT-B is pressed twice a Face Loop, rather than an Edge Loop, is highlighted. You can force the new edge loop to stay at a given, fixed, distance from the edge loop to which the reference vertex belongs by switching proportional mode off with P. This turns the highlighted edgeloop blue too (Proportional and Smooth face cuts. Furthermore, by default, new vertices for the new edge loop are placed exactly on the preexisting edges. If a smoother result is desired S can be used, prior to finalazing the split, to set smooth mode on/off. If smooth mode is on then new vertices are not on the previous edge any more but displaced in the direction of the normal to the edge by a given percentage. A pop up asks for the percentage after LMB is pressed to finalize the split (Proportional and Smooth face cuts. This setting controls the amount of light "emitted" from our dome. [. . . ] A pop up asks for the percentage after LMB is pressed to finalize the split (Proportional and Smooth face cuts. This setting controls the amount of light "emitted" from our dome. [. . . ]