Furuno GP-3500F - Manual (Page 67)

4. MARKS & LINES
4-3
4.2 Changing Mark Color
Mark can be displayed in red, yellow, green, light-blue, purple, blue, or white.
1. Press the [MARK COLOR] key to show the CHANGE MARK COLOR
window.
PRESS APPROPRIATE NUMERIC KEY TO SELECT COLOR.
CHANGE MARK COLOR
1. 2. 3. 4. 5. 6. 7. 8. KEY'S COLOR
Change mark color window
2. Press the appropriate numeric key to choose a color.
[1] through [7]: The mark or line is entered at own ship’s position (or cursor
position) in the color selected.
[8]: The mark is entered at own ship’s position (or cursor position) in the color
and shape shown on the label of the numeric key.
You may show marks in one color or the colors shown on the numeric key.