How do I edit my thumbnail on Facebook Mobile?

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How to Add/Change an App Thumbnail Image

1. Step 1: Click the numbered dropdown arrow.
2. Step 2: Click the pencil icon on the image you want tochange.
3. Step 3: Click "Edit Settings"
4. Step 4: Click "Change" on Custom Tab Image.
5. Step 5: Hover over thumbnail image & click "Edit"
6. Step 6: Click "Choose File"
7. Step 7 : Upload an image file.

Similarly, how do I change my thumbnail on Facebook on my iPhone?

1. Open Safari on your iPhone and navigate to the Facebooksite.
2. Tap the "Settings" icon in the top-left corner of thescreen.
3. Tap the "Update Info" button.
4. Tap one of the "Edit" buttons in the About You section to opena dialog box where you can edit your profile.

Beside above, how do I edit my thumbnail on Facebook?

To reposition your profile picture thumbnail:

1. From News Feed, click your name in the top left.
2. Hover over your profile picture and click Update.
3. Click in the top right.
4. Use the scale at the bottom to zoom in and out, and drag theimage to move it around. When you're done click Save.

How do I change my video thumbnail on mobile?

Add custom or automatic thumbnails

1. In the YouTube Studio app, tap Menu then Videos.
2. Select the video you want to edit the thumbnail for.
3. Tap Edit .
4. Tap Edit thumbnail.
5. Select your thumbnail:
6. Confirm your thumbnail selection and tap Select.
7. Tap Save.