[Gimp-user] [Animations] How to merge down multiple layers?

[R45XvezA <R45XvezA protonmail ch>]

Sample: I have a GIF sticker and i want to add some texts to it Once wrote text using "text tool" then it 
create a new layer and we can right click on that layer then select 'merge down' but it apply to one layer 
bottom to it. How to apply for all layers at once? (the GIF has 20 layers as frames including background 
image)

Use cases
For animations (create or edit gifs)

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