I have both CE and PE charts,
On CE chart i click and select say 225 qty, and then click on PE chart for some analysis, then come back to CE chart it again back to 75!
there are no keyboard shortcuts to place quick orders, or pre-defined qty for scalper tool.
As per the current flow @Jigar, the scalper default quantity resets to 1 when switching to a different scrip/contract. We understand the inconvenience and have noted this for further review and optimisation.