This is from the D100 manual bur it should be the same:
CDI/Glideslope Indicators
When the EFIS-D100 is receiving CDI or glideslope information from a GPS or NAV radio, they can be displayed on the main EFIS display as well as the on the full HSI page (as described in the HSI Operation section on page 6-1). The data source is chosen on the HSI page using the NAVSRC button; the EFIS and HSI CDI/GS displays are always synchronized to the same source. There is no way to change the source on the EFIS screen.
On the EFIS page, these two items are enabled via the EFIS > SETUP > CLUTTR menu under a single item, which can be set to either CDI:N, CDI:Y, or CDI+GS.
Available Pages
The CDI is located just above the slip/skid ball when displayed, and behaves much as described in the HSI Operation section on page 6-1. The CDI needle is green when sourced from a NAV radio and magenta when sourced from GPS.
When to/from information is available, the center of the CDI is an arrow; when on an ILS, it is a filled-in square. The glideslope indicator is located to the left of the roll scale tape, and behaves much as described in the HSI Operation section on page 6-1. The GS needle is green when sourced from a NAV radio and magenta when sourced from GPS, and appears only when tuned to an ILS or a GPS source with vertical guidance.
Due to screen space limitations, turning on the glideslope prevents a left info item from being displayed on the 2/3-screen EFIS page. Additionally, at extreme roll angles, the glideslope is hidden to provide space for other screen elements.