What types of widgets can I specify position?

[CHASEONHO]

The following css style is applied to the grid widget, but the button does not position well.

.pos {
margin-top: 30%;
height: 30ch;
}

When fixing the position of a widget, is it common to specify a position with a grid widget and then include the widget in it?

Any other good suggestions?

regards

[tmccombie · Accepted solution]

Yes, it is recommended to use the grid widget to help with positioning of widgets. 

[CHASEONHO]

If so, do you specify as many as% when specifying the location?
Or do you recommend positioning in px?

[tmccombie]

I have found specifying in px works well. 

[CHASEONHO]

Thanks @tmccombie, have a good day