Not sure if this helps but I have a hdmi monitor that is 1280×800 and switched my resolution from 800×600 to 640×480 and it fills the screen 100% now. I may of had to change one other setting I can’t remember though.
Necessary and Functional
These cookies are placed to make it possible to analyze this website (with Google Analytics) and optimize for the purpose of a.o. the usability.
Cookie names: _ga, _gat, _gid
These cookies are placed to show advertisements (of Google AdSense) and to get these close to your interest.
Cookie names: id, IDE, FLC, DSID, SNID, NID
These cookies are required to show the cookie notification bar, remember your cookie acceptance choice and apply this choice.
Cookie names: privacy_embeds, wpca_consent, woocommerce_cart_hash, woocommerce_items_in_cart, wp_woocommerce_session_, wp-settings-1, wp-settings-time-1