@julietang
Right click or Alt c and select Create Drawing View...

Select your drawing template or a blank template.
Select the right side of the View Cube...

Right click select OK.
Right click on the view in the browser and select Retrieve Model Annotations.


You can drag these to aesthetically pleasing positions and drag the connection points of extension lines to new locations if needed.
There is an Application Option to retrieve dimensions automatically, but unless all of your parts are relatively simple you probably do not want this active.

Right click on the 3 inch dimension and select Edit Model Dimension...

Change the 3 inch to 4 inch and click the green checkmark.
You just edited the part from the drawing.
I just wanted to demonstrate that you can edit these retrieved model dimensions.
Undo that edit to go back to the 3 inch dimension.
Edit: Double click on these images above to enlarge if they are too small to see on your screen.
Next we will experiment with different ways of placing the holes...
-----------------------------------------------------------------------------------------
Autodesk Inventor 2019 Certified Professional
Autodesk AutoCAD 2013 Certified Professional
Certified SolidWorks Professional