Please see: <http://sandbox.easyeda.com/editor#id=BVSCAWigC> 1) In V1.9.1 it is possible to edit: V1: `PULSE(0 {vcc} 100n {tedge} {tedge} 0.1u )` interchangeably either in the text in the schematic or in the Properties panel. When editing the same thing in the text in Sandbox V1.11.1, on clicking back on the schematic canvas, the text is shortened (the spaces are stripped out) and when viewed in the Properties panel, all the parameters have been put into the Vinitial(V) field. Editing in the Properties panel is OK. 2) Editing the number in the prefix text in user created spice symbols is broken. Any attempt to edit this number causes it to auto-increment! Although: sometimes the number *can* be edited as required (if the schematic has just been reopened?). Very confusing. Editing prefix text in EasyEDA parts (such as resistorsseems to be OK. Please try it in the link above. :)