Otherwise, there is still the google method which is doing quite well.
To sum up, an equation allows you to replace any value in your design with a parameterizable data.
Simply right-click on the equation folder in the function tree and select "Equation Management".
Then, you have to click on "New equation" and select the value to be set on the drawing.
Then, you just have to change the values according to what you want (it is possible to enter an equation according to another by selecting it directly in the equation management... example: L1 is a parameterized value, we create L2=L1/2. It's possible).
This is only a brief summary but the function of equations allows you to set up a complete drawing so for a wire mesh, it's very simple:)