If you'd like to change your name in Metatask, please open the account drop down menu and click "Profile settings" option. Then choose tab "General settings".
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You can change your first and last name here.

It is also possible to set avatar for your Metatask account. Choose the same "General settings"  tab and click "Upload photo". Please pay attention that profile photos must be JPGs or PNGs with size up to 5MB.

Once your photo is uploaded, you can both change or clear it (use the corresponding link buttons near your photo). Remember to press button "Save changes" in the end.