In a draft document, you can draw, design, annotate, and dimension on the 2D Model sheet. The 2D Model sheet is a special sheet used exclusively for working in 2D model space. It enables you to draw on the sheet and to annotate at a scale appropriate for the overall size of the part you are designing, yet it prints your drawing with annotations appropriately scaled to the output sheet size you specify.
To display the 2D Model sheet, select the View tab→Sheet Views group→2D Model command, and then click the document sheet tab labeled 2D Model.
To set the size and scale of your work area on the 2D Model sheet, select the Application menu→Drawing Area Setup command. Work area setup calculations are made automatically based on sheet size and the dimensions of your intended design.