The most important factor that determines the size of the menu is the content of the items. If you want to reduce the size of your menu you should keep in mind that the menu must have at least the necessary size for the content of the items to fit inside. If the content is large, then you should first of all reduce the size of the content.

The properties that determine the size of each item and the menu are the <Minimum Width>in the Main/Sub/Sub+ Group Style Editor (if you want to increase the size, perhaps this is the only property you should change), the <Size> in the Main/Sub/Sub+Items Style Editor and also the <Text Margin> and the <Content Padding> in the Main/Sub/Sub+ Items Style Editor.

1. How to specify the Minimum Width property of a group.

1. How to specify the <Minimum Width> property of a group.

2. How to speicfy the Size property of the items of your menu.

2. How to speicfy the <Size> property of the items of your menu.

3. How to specify the Text Margin property of the items of your menu.

3. How to specify the <Text Margin> property of the items of your menu.

4. How to specify the Content Padding property of your menu items.

4. How to specify the <Content Padding> property of the items of your menu.

Also you can check/uncheck the "Uniform Items" option in the <Type> property of the Main/Sub/Sub+ Group Style Editor that forces all items to have the same size - the size of  the largest item. You can modify the values of these properties and change the size of the items.

5. How to specify the Uniform Items option of a group.

5. How to specify the "Uniform Items" option of a group.

 

Finally, If you just want to widen the menu, you have only to change the <Minimum Width> property of the Main Group Style in the Style Editor.