No Direct Renaming Feature: Reddit doesn’t offer a direct username change option. However, there are methods to work around this limitation. 

One-time Username Change: Reddit allows users to change their username once, so choose wisely! 

No Impact on Posts and Comments: Changing your username doesn't alter your past interactions or contributions on Reddit. 

Access Account Settings: Navigate to "User Settings" on Reddit to initiate the username change process. 

Keep Your Karma: Your earned Karma remains intact after changing your username. 

Subreddit Membership Unaffected: Changing your username won’t affect your memberships in various subreddits. 

Contacting Reddit Support: In specific circumstances, Reddit support might assist in username changes due to sensitive or critical reasons. 

Inactivity Purge: Unused accounts with no activity for a prolonged period might get purged, allowing you to reuse the username. 

Third-party Applications: Some third-party apps might not recognize your new username immediately; they may need manual updating. 

Privacy Concerns: Consider privacy implications as changing your username may not entirely erase your online footprint. 

Timeframe for Change: After initiating a username change, the process takes effect instantly across Reddit. 

Limits on Alteration: Usernames can't be changed to an existing username or one that violates Reddit’s policies. 

External Links & Mentions: External links mentioning your old username won’t automatically update to your new one. 

Account Age Impact: The age of your Reddit account remains unchanged despite altering the username. 

Username Display: New username changes reflect immediately in your profile but might take time to update on certain interfaces.