Sketch a rectangle and add some dimensions and extrude the shape by some depth.
Change text size solidworks sheet metal.
Then use the scale feature.
Style select none to display the text with no border or select a border style.
Scale the body by a factor of 2 0 double its original size.
In the propertymanager clear document font.
Size select a size from the list a specified number of characters tight fit which adjusts automatically to the text or custom size where you can set the size.
Select from the following then click ok.
Select drawing then click ok.
Set the font options and click ok.
Take note of what your dimensions are.
Select the note text or label.
Click tools options document properties detailing.
Lets you change the format or language for flat pattern bend notes in drawings.
Select the note text or label.
Try editing the rectangle sketch though.
Alternatively in the featuremanager design tree right click the annotations folder and click details to display the annotation properties dialog box in the dialog box clear always display text at the same size.
To set a custom text scale.
Click on the sheet metal tab select base flange tab and give 1 mm to the sheet metal parameters.
Click new standard toolbar.
Evaluate measure should show that the body is now double its original size.