You can find options for the project-wide appearance and position of pedal lines on the Pedal Lines page in Engraving Options.
The options on the Pedal Lines page allow you to change the symbol shown at the start of each type of pedal line, the appearance of pedal line symbols on subsequent systems, the appearance of pedal continuation lines, and the width of retake notches. You can also set precise values for the gaps between pedal lines and the staff or other objects and change the default position of pedal lines, start signs, retakes, and pedal line ends relative to noteheads and grace notes.
There are musical examples for many options to demonstrate how they affect the appearance of your music.