D-Link DES-1526 Manual page 46

When you select VID Table Setting, press "Add new VID" to
create new VID group, from port 01 ~ port 26 (26F), select
Untag Port, Tag Port, or Not Member for each port. To save the
VID group, press the "Apply" button. To remove the selected
VID group, select the VID group and press "Remove the VID"
button. To modify the VID group setting, select the VID group
and change the setting, and press the "Apply" button to save the
settings.
Figure 20. VLAN Settings
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