Work Manager TextField Height Issue

Experts,

Appreciate your help,

Am just trying to increase the TextField Height which is running through WIndows WPF client.But its still not increasing as per the expectation even though we had increased in agentry editor as multiple rows but its still stuck and shows the same height

it increase its height if we increase the font size only from styles,but thats not my requirment

Thanks for your kind comments.

Attached my screen shots

Thanks

Kavi