Je was op zoek naar: the width (Engels - Wels)

set the width
gosod y lled

the width of the window
lled y ffenest

the width of the box outline
lled amlinell y blwch

change the width of a column
newid lled colofn.

the width of the playing field.
lled y maes chwarae.

will keep the width of the crop constant
creu lluniau o' r tryloywderau

what multiple to constrain the width to.
pa luosrif i orfodi'r lled i fod.

the width at which the text is wrapped
at ba led i amlapio'r testun

the width for the first table column.
teitl y golofn chwith

extra space to add to the width allocation.
gofod i'w ychwanegu at y dyraniad lled.

change the width of the currently selected column
lleihau maint y wynebfath

change the width of the currently selected column.
arddull

enter the width (in pixels) for the left column
teitl y golofn chwith

change the width of the plot line in steps of 0.1mm.
5

the width of the empty border outside the containers children
lled y border gwag y tu fas i blant y cynhwysydd

enter the width (in pixels) for the right column
teitl y golofn dde

toggles the ability to change the width of the selected stencils
ffurfwedd pen saeth

specifies the metric to use when setting the width and height of the paper
penodi'r metrig i'w ddefnyddio wrth osod lled ac uchder y papur

the width is the thickness of the separator line, set to 0 for no separator line.
dim hunangadw

the size of the separator line can be defined as a percentage of the width of the page.
creu ffeil wrth gefn