There is no variation of it that encourages a shooter to put their digit in front of the muzzle at the same time they put a finger on the trigger.
One press-check method places one or more fingers on the muzzle of the slide (not directly over the muzzle--that wouldn't work) and with the thumb in the triggerguard, though not on the trigger.
Of course, for the slide to be retracted, the thumb safety of a 1911 must be off, and it's common to see the press check done with the strong hand holding the gun in a firing grip and probably depressing the grip safety.
Not exactly ideal from a safety standpoint for more than one reason, none of which should really need to be explained.
You may not recall that a good many experienced shooters have had unintended discharges.
Press checks (or similar manipulations) are not recommended as a way to clear a firearm.
To clear a semi-auto pistol, drop the mag, lock back the slide, then visually and preferably also manually check the chamber.
So checking the status of one's weapon is a very good habit to develop and maintain.
As long as it is being done with purpose and done safely, it doesn't hurt to check the status of one's weapons. Needless manipulation of a loaded firearm that is "on duty" is asking for trouble--that's what I mean when I say it needs to be done "with purpose" as opposed to being done for show or as some kind of an OCD "twitch".
For example, press-checking at the range is pretty pointless. You just loaded the gun, you don't really need to partially open the slide to refresh your memory about what happened a second ago. If you really wonder if a round fed, load the chamber from a another mag for your first round and check it to see if it's down a round before you put the full one in.
As far as checking to verify a gun is empty, that should be done any time an "off duty" gun is handled--and should be done with a more thorough and foolproof technique than press-checking.