[Theme SmartMag] Automatic Resizing Featured Image

Yes there is a way. For this you have to edit functions.php.

Problem – The fix will not work for old articles. Only when you update new articles with new feature images it will fit well. For old articles you have to manually upload images once again.

Fix –
Go in Appearance > Editor.
Select the default theme SmartMag and click on functions.php.
Now look for below code –

// Default slider and posts with sidebar.
‘main-slider’ => array(‘width’ => 702, ‘height’ => 336),

Set the width to 800. I tested with 800 where it is working fine.

Click update at the bottom.

Then test. TC.