Vensim includes menu commands to help you lay out your sketch in a tidy manner. These commands allow you to resize sketch objects to default values, line up objects by position with a "last-selected" object, size objects to the last-selected, and more.
We shall tidy up the diagram, centering most variables on Work To Do.
Ø Select the Move/Size tool by clicking on it or pressing keyboard number 2.
Ø Click once on overtime hours required then hold the Shift key down and click once on Work To Do. Select menu Layout>Center on LastSel.
overtime hours required will move to line up on the center of Work To Do.
Ø Click once on quality of work then hold the Shift key down and click once on Work To Do. Select menu Layout>Vertical on LastSel.
Ø Click once on fatigue then hold the Shift key down and click once on quality of work. Select menu Layout>Center on LastSel.
Ø Click once on fatigue then hold the Shift key down and click once on overtime hours required. Select menu Layout>Vertical on LastSel.
Ø Drag work done to right of and halfway between Work To Do and overtime hours required.
Ø Move the arrows to make neat curves resembling a circle (see below).
Your sketch should look something like: