source image locked

[atomic field]

I can't edit some of the textures, because the Source Image is apparently locked, but I never locked them and am confused on how to unlock them.

I found this comment in a forum

With the target image selected, click the palette menu icon (three little bars) in the corner of the parameters palette, and uncheck "lock default deformer".

But I don't know which palette menu icon they mean, since there are so many "3 little bars"

[winged sail]

in the parameter tab

there's a line of icons at the top

and the last one is three little bars

that's what they mean

[manic stump]

this ^^