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...

• one <-- concat("-layer",sp,"m",sp,title)
• two <-- concat("c",sp,"t",sp,point_nonunits(color<0>color^<0>))
• three <-- concat(title)
• four <-- concat(sp,sp)
• tot <-- stack(one,two,three,four)
• return tot

...

• one <-- concat("-layer",sp,"s",sp,title)
• two <-- concat(sp,sp)
• tot <-- stack(one,two)
• return tot

layer_new1
layer_new1 :=

• one <-- concat("-layer",sp,"m",sp,title)
• two <-- concat("c",sp,"c",sp,point_nonunits(color^<0>))
• three <-- concat(title)
• four <-- concat(sp,sp)
• tot <-- stack(one,two,three,four)
• return tot

layer_freeze - a function that locks a layer so that no edits can be made
layer_freeze :=

• one <-- concat("-layer",sp,"f",sp,title)
• two <-- concat(sp,sp)
• tot <-- stack(one,two)
• return tot

layer_thaw - a function that unlocks a layer so that edits can be made
layer_thaw :=

• one <-- concat("-layer",sp,"t",sp,title)
• two <-- concat(sp,sp)
• tot <-- stack(one,two)
• return tot