Expected / intuitive behavior which is not implemented: 1. After selecting a parametric footprint in the Library window I would like to change the default parameters using up and down arrows associated with edit fields starting from the default values, that is when I click an up arrow or rotate the mouse roll up the value inside the edit field should change from nothing to an incremented default value (for example "251 mil") for a SO package row_spacing parameter. Moreover, the first value that appeares in the edit field should be in natural units for the parameter (for example "mm" for MSOP pad_spacing) and should be incremented by the default increment for this unit (for example up to "0.70 mm" from the default 0.65 mm incremented by the associated 0.05 mm for MSOP pad_spacing) +2. The parameter edit field width should not change when a new unit is entered (or should it?) +3. When a parameter edit field is deleted (or only whitespace remains), the parameter should return to its default value and the Filter edit field contents in the underlying Library window should be updated accordingly (the parameter should be removed from its contents unless it is mandatory) 4. Footprints should be updated with a new parameter value on pressing "Enter" key while editing the value even when the it contains only a valid numeric value without a unit. A default unit should be added to the string in the parameter Edit field (but please leave the cursor where it was). I expect a similar behavior as when I enter a numeric value without unit and click up or down arrow (at the Edit field), but without incrementing / decrementing the value of course. An alternative solution is a separate units edit field / combo box for every parameter. This kind of behavior is very well solved in LabView, where Edit fields / numeric controls have an optional (editable) unit label. See this for an example an concept description: http://zone.ni.com/reference/en-XX/help/371361L-01/lvconcepts/numeric_data/ I don't encourage you to rewrite current solution - it is actually quite good. 5. Paste layer should be parametrised at the footprint level. Paste opening in stencil should usually be smaller than pad size by about 30% to avoid bridges on reflow soldering. This actually gives me a lot of headache in my production. When I use the old pcb, paste layer is always the same as footprints. Fortunately the fab that I use - Eurocircuits - recently introduced an online paste layer editor where I can manually shrink paste openings for all fine pitch components (tssop, msop, qfn, tqfp with 0.4 mm pith (this one is actually the worst) ) just before sending pcb-s and stencils for production. Regards, Piotr