I use the u-darling, but also personalized settings of the boot background image, the steps are as follows

1, and then run the computer above the u-darling, click on the figure below the "personalized settings".

2, select "Background Settings" in the "Select Picture", and then this place to select the picture that needs to be displayed in the startup PE.

"Font Settings" in the "Title Font" and "Menu Font", set the color, size and format of these two fonts.

After the settings are completed, select Save Settings at the bottom. This will make the picture will become your own settings of the picture, the font into their own settings of the font.