DrawOnYourScreen/stylesheet.css

/*
 * Except for the font,
 * you don't need to restart the extension.
 * Just save this file and the changes will be applied for your next brushstroke.
 *
 * line-join (no string):
 * 0 : miter, 1 : round, 2 : bevel
 * line-cap (no string):
 * 0 : butt, 1 : round, 2 : square
 *
 * dash:
 * dash-array-on is the length of dashes (no dashes if 0, you can put 0.1 to get dots or square according to line-cap)
 * dash-array-off is the length of gaps (no dashes if 0)
 *
 * font:
 * only one family : no comma separated list of families like "font1, font2, ..., Sans-Serif"
 * font family can be any font installed, or a generic family name (Serif, Sans-Serif, Monospace, Cursive, Fantasy)
 * font weight and font style : no upper case when string
 * weight <= 500 (or lighter, normal, medium) is rendered as normal
 * weight > 500 (or bolder, bold) is rendered as bold
 * oblique and italic style support depends on the font family and seem to be rendered identically
 *
 */

.draw-on-your-screen {
    -drawing-line-width: 5px;
    -drawing-line-join: 1;
    -drawing-line-cap: 1;
    -drawing-dash-array-on: 5px;
    -drawing-dash-array-off: 15px;
    -drawing-dash-offset: 0px;
    -drawing-color1: HotPink;
    -drawing-color2: Cyan;
    -drawing-color3: yellow;
    -drawing-color4: Orangered;
    -drawing-color5: Chartreuse;
    -drawing-color6: DarkViolet;
    -drawing-color7: #ffffff;
    -drawing-color8: rgba(130, 130, 130, 0.3);
    -drawing-color9: rgb(0, 0, 0);
    -drawing-background-color: #2e3436; /* GS osd_bg_color: #2e3436, GTK Adwaita-dark theme_base_color: #2d2c2e */
    font-family: Cantarell;
    font-weight: normal;
    font-style: normal;
}

/*********************************************/

/* square area */

.draw-on-your-screen-square-area {
    outline: 2px solid rgba(255, 0, 0, 0.7);
}

.draw-on-your-screen-square-area:insensitive {
    outline: none;
}

/* The following styles don't affect the drawing,
 * but the "Ctrl + F1" on-screen-display */

 .draw-on-your-screen-helper {
    margin: 0;
    spacing: 0.5em;
 }
 
 .draw-on-your-screen-helper StBoxLayout {
    spacing: 7em;
 }
 
 .draw-on-your-screen-helper StBoxLayout StLabel {
    text-align: right;
    font-weight: normal;
 }
 
 .draw-on-your-screen-separator {
    min-height: 0.6em;
 }
 
 /* context menu */
 
 .draw-on-your-screen-menu {
    font-size: 0.98em; /* default: 1em */
 }
 
 .draw-on-your-screen-menu .popup-menu-item {
    padding-top: .37em; /* default: .4em */
    padding-bottom: .37em;
}
 
  .draw-on-your-screen-menu-separator StLabel {
    font-size: 0;
 }
 
 .draw-on-your-screen-menu-slider-label {
    min-width: 3em;
    text-align: right;
 }