I use a lot of parameters and also simple but sometimes lengthy expressions in the value fields of my command dialogue boxes. In the interest of readability, I name my user parameters descriptively, as one should, which means a parameter name can be two or three words long, joined by underscores. When I use those descriptive names for my user parameters as factors in an expression describing how I want my objects to be formed, moved, extruded, jointed, etc etc, then the expression can become longish, e.g. "-( gate_width - ( 2 * box_clearance ) )" and similar. The problem is these are hard to enter and to later edit gracefully because the expression entry fields are too short and they don't automatically or manually expand to allow for easy editing. You have to somewhat blindly click, drag, arrow-key, whatever, and hope you get it right.
Please improve the editing behaviour of expression fields in general by allowing them to expand, either automatically, or manually, or both.
*Posted to idea station here