What does z stand for in vim? – vi.stackexchange.com #JHedzWorlD

I was looking up at tips on screen shifting and came across the following tips:

zz = shift current line to middle of screen zt = shift current line to top of screen zb = shift current line to bottom of screen 

My question is what is z? What does it stand for? what other functionality might z have?

z doesn’t stand for anything. g and z were two letters that went unused as standalone commands (z<CR>, z., z+, z-, and z^ existed) in vi, so they have been repurposed in Vim as a prefix for a variety of commands.

:help z and :help g will show you all the commands that sit behind these prefixes.

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What does z stand for in vim? – vi.stackexchange.com #JHedzWorlD