Modify a style on a field

[axc]

As a newbie can anyone help me with the syntax to change a read-only/no tab field to entry mode.

I have tried

modify field-name, style read-only false

and

modify field-name, style not read-only

I cannot see any specific clues/examples throgh the help (apart from the obvious)

I know its simple but this (with many others) is eluding me.

TIA

[axc]

Worked it out

modify field-name, not read-only

so in-general it goes

modify field-name, [not] style-id