Calla : Call to action boxes after logo
Install & Activate Image widget plugin
Before adding this widget, you Install and Activate Image Widget plugin (as recommended by my theme notice box).

Go to Appearance > Widgets and find “3 Featured Images header” tab.
Find “Image Widget” widget and drag or put it under “3 Featured Images header“, add only 3 widgets, so it will look like this image bellow :

Upload the image content
After you add the widget, click the widget (click the triangle), upload Image
Fill in the following input boxes :
- Title = Title of your item/page you want to display
- Link = Link to the page/post
- Size = Choose calltoaction_img (recommended size : 640px x 853px)
- Align = Center
Save.
Repeat for the rest of other widgets.
Results

Please note : These 3 images widget only appear on Front page and make sure to choose “Latest blog posts” as your Front page display setting (in Settings > Reading).