Is there a way to list all known pgfkeys (i.e., those that are currently set)?
Concretely, I'm looking for a way to get the value of the tikz scale option. I was hoping there would be a pgfkey for that. But it seems more useful to ask the general question of listing all pgfkeys.
\pgfkeysvalueof? – Manuel Jan 15 '16 at 23:46scale=5, list all keys and search for5, to see if there's a key set to the scale. – Keelan Jan 15 '16 at 23:47scaleoption… I thought you knew :) I don't understand what you want. – Manuel Jan 15 '16 at 23:51scale/xsacle/yscalefor instance, share the similar purpose. And even worse, the effect of scaling and shifting is mixed, accumulated and handled by lower-level registers. So what do you exactly want? – Symbol 1 Jan 16 '16 at 11:07