ffDiaporama uses a style sheet system to facilitate the settings for various things.
Style sheets exist for:
- Controlling the block coordinates, including the parameters of size, position and block rotation, and also the framing style.
- Controlling the block shape, which includes the parameters of form, opacity, shadow and block borders.
- Controlling image framing, which includes the parameters of geometrical constraint and size.
- Formatting text, which includes the parameters of font, character attributes, alignment and text shadow.
- Controlling text background, which includes the parameters of background (color, brush, etc.).

Open the style menu:
- The first part of the menu lists the known styles.
- If the current settings correspond to a known style, this style is marked with an asterisk.
- The standard styles of ffDiaporama are marked with this icon:

- Standard styles that you have modified and styles which you created are marked with this icon:

- The second part of the menu allows you to modify the style list.
- Create a new style: allows you to create a new style with the current settings. When you select this option, a dialog appears asking you to name the new style.
- Modify an existing style: allows you to change the settings of an existing style by using the current settings. When you select this option, the list of known styles appears. Select the style to be modified.
- Manage styles: opens the Manage style dialog.