Some windows open and are too small to read

I have a new Dell Inspiron 15 series 7000 which can with Windows 10. I am still learning my way around 10 and I'm no computer wiz. Some windows which open are very tiny. I am not referring to the size of the icons and text as it appears in some windows. Most windows are fine but a few are hardly legible. This is not browser specific, as one of the places I encounter it is when I do a Remote Desktop Connection. I have tried changing all of the display settings I can find but these adjust things across the board and once I get the small stuff large enough to see, much of what I do becomes way too large to fit on the monitor and is a real pain. Anyone else having this trouble? Any ideas? Thank you in advance.

Matthew

One possible solution is if you are using a USB Microsoft mouse, the scroll wheel can be set to magnify in the Microsoft mouse and keyboard center(located in app apps). It will amplify or diminish by scrolling up or down. This is probable true with other aftermarket mice but I'm not positive. I usually use a mouse with my notebook since trackpads cramp my hands after a while. There may be a trackpad setting for this on your Dell also.