Translations:Creating a simple part with Draft and Part WB/25/en

Also trim the left-most vertical line to form the lower corner of the chamfer. Here you probably need to do the trimming in 2 steps. The trim function can make an undesired flip, keeping the longest part of the object to be trimmed. In those cases, trim a shorter distance first by simply clicking in the 3D view for example halfway of your intended trim. The trim function accepts any click in the 3D view. If you get it wrong, just use Undo and  Refresh (the latter often called recompute) and try again.