Filling layer with transparency

[revnart]

Hey everyone, I missed this feature over the years or it's something new?
I reset colors with (D) and if I use Alt+Backspace I fill the layer with background color, Ctrl+Backspace fills with foreground color = this is completely normal but when I add Shift if fills only opaque areas and if I use Ctrrl+Shift+Alt+Backspace it fills with a selected element from history:

Original:

Ctrl+Shift+Backspace:

Alt+Shift+Backspace:

Alt+Backspace and then Ctrl+Alt+Shift+Backspace:


It was always like that? and I didn't know that and was wasting time clicking "lock transparency" icon in layers panel?

 

[thebestcpu]

Hi revnart
I always enjoy shortcut key posts because I did not know about them (or forgot about them). The following web site indicates here is what they had all the way back to CS2 yet have not personally verified that from any other source than this website on PS shortcuts: https://www.nobledesktop.com/shortcuts/photoshopcs2/pc
Thanks for posting
John Wheeler
Image shown for CS2 of those shortcuts including Shift+Backspace to pull up fill dialog. Very similar to what you posted

 

[revnart]

So I missed this shortcut somehow Shame I didn't know it before but it's nice to know it