Sanremo theme use default WordPress logo function. To add/change your blogo logo you must do the following:
Go to Customize/Site Identity.
Click on change logo button
Choose from Media gallery or upload your new logo. Suggested image dimensions: 320 × 140
After photo upload, you will be redirected to "Crop Image" section. You can crop your image (if logo is larger than theme recommended) or if image size is in recommended size, then just click on "skip cropping".
Done! Now you have a new shiny logo.
Check out video tutorial "how to change Sanremo theme logo"
How to setup Sanremo theme slider
Sanremo theme have built in slider and no extra plugin is required.
Slider Settings are located in Appearance >> Customize >> Slider Options
To enable slider just click on "show slider" checkbox and you will see that slider appears
Select category from drop-down to use for Sanremo slider
Make sure you have Featured Images uploaded and added for those Posts
If you want to show specific posts in slider, then make new category (for example: "Featured") and assign posts to this "Featured" category. Then choose "Featured" category as slider main category.
How to add Instagram Feed to footer and sidebar
Sanremo theme have additional Footer widgets section which is made for instagram feed. Check out video tutorial how to add Instagram feed to Sanremo WordPress theme