Edit window: Ctrl click on Vol window changes to PK and DLY?

I'm still learning that when I want to use the Ctrl key to make a fine tune adjustment to the Volume of a track in the Edit Window that I have to click the volume first and then select the Ctrl key.



If I select the Ctrl key before clicking on the Volume window it seems to change the window to display either a "PK" or a "DLY" value.



Here's my question; is there any risk of changing the PK or DLY value inadvertently when I make this mistake or is it a view only situation?



I stumble my way back to the Volume parameter and make my adjustment but I worry that I may have made an adjustment while not recognizing that I have done so.



Thanks for any advice you can offer.