: After Effects: custom counter expression I'm working in After Affects for a college institutional video and I'm making a timeline that needs numbers counting. That part I figured out. Using expression

@Berryessa866

wide_eyed_pupil's answer is correct, I'll give you a practical example...

Set up your slider control and an expression on your text layer's "Source Text". In the expression you want to get your slider value like so:

val = Math.round(thisLayer.effect("Slider Control")("Slider"));


The Math.round() just makes sure we have an integer, the rest just pulls the "Slider" value from the correct effect and layer.

Then assuming we want 4 digits, we append our slider value to 4 "0"s (as a string), then use slice() to return the last 4 digits of the whole string (if you want a different number of digits then just add enough "0"s and change the offset you give to slice()):

('0000' + val).slice(-4)


Which should look like this:

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@Yeniel278

typically you do this with a number formatting patch in other applications, not sure about expressions but if you can convert to text concatenate "0000" with n where n is your incrementing number and then substring the right 4 characters. check the docs for string operations to see if possible.

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