How can I set project in portfolio that they will not show on blog site?

I was thinking if it’s possible to set portfolio in way that prijects will not show on blog site but in No Sidebar or Full Width site?

Or at least, can I delete this big picture from single project site (1) ?
And can I changes size thumbnails in portfolio?

Hey there

I hope you are well today and thank you for your question.

You can try achieving this by adding the following CSS code in the Custom CSS option of your theme on the below path.
This CSS will remove the portfolio image, sidebar, and stretch the content to 100%

Admin Area -> Appearance -> Customize -> Additional CSS
/remove sidebar/
.single-jetpack-portfolio aside#secondary {
display: none;
/remove header image/
.single-jetpack-portfolio header.entry-header.nolist {
display: none;
.single-jetpack-portfolio div#primary {
width: 100%;
margin: 0 auto;

Best Regards,