For DITA2Go to make startflag and endflag (see §9.4.1 Specifying text properties for flags) display something in output, you must specify the image, the text, or both to display:
To specify an image for a conditional flag assigned property startflag:
[CondStartFlagImages]
; flag name = href for an image that marks the start of the flagged
; area, usually a relative path or a URL for HTML
flagname = reference/to/image.gif
This setting takes effect only if the startflag property is assigned to flagname in [ConditionalFlags]; see §9.4.1 Specifying text properties for flags.
To specify alternate text for a conditional flag assigned property startflag:
[CondStartFlagAltText]
; flag name = alt text for the start flag image
flagname = Start of change
If no image is assigned to flagname in [CondStartFlagImages], the text assigned here is displayed instead. This setting takes effect only if the startflag property is assigned to flagname in [ConditionalFlags]; see §9.4.1 Specifying text properties for flags.
To specify an image for a conditional flag assigned property endflag:
[CondEndFlagImages]
; flag name = href for an image that marks the end of the flagged
; area, usually a relative path or a URL for HTML
flagname = reference/to/image.gif
This setting takes effect only if the endflag property is assigned to flagname in [ConditionalFlags]; see §9.4.1 Specifying text properties for flags.
To specify alternate text for a conditional flag assigned property endflag:
[CondEndFlagAltText]
; flag name = alt text for the end flag image
flagname = End of change
If no image is assigned to flagname in [CondEndFlagImages], the text assigned here is displayed instead. This setting takes effect only if the endflag property is assigned to flagname in [ConditionalFlags]; see §9.4.1 Specifying text properties for flags.