Dear Adobe's Support,
I using Adobe Photoshop CC (2015 or 2017) on resolution 4K (3840x2160) very slow: zoom, move,.... I try change to resolution Full HD (1920x1080), using very fast.
My laptop: 4K, Core i7 7700 HQ, Video card: 1050 Ti, 8GB RAM and 128 SSD.
If resolution Full HD on Monitor 4K is blur.
Thanks and best regards,
I have three displays on my Nvidial Quadro k2200 adapter two 1600x1200 displays and a 3840x2160 4k Display zooming in Photoshop is instantaneous on all these displays. By the Way this is a User Forum not Adobe support. Zoomed to 100% actual image Pivels the Par of the image that fots on the 4K Display is quite sharp on my Dell 24" 4k Display it has a 185PPI resolution. Zoom to any other Zoom percent your image a quickly scaled image and the scaningis no not alway good at some zoom percents. Photoshop zooms for speed not quality. The only time you see your images actual pixels is zoomed to 100%. a 4K display has 3840x2160 pixels. 8MP many digital camera image have more than twice that many pixels. I full resolution image will not fit on a 4k Display.
Full resolution is 4K 3840x2160 pixels at some PPI density. 1920x1080 is 1K half resolution 4 4K pixels are used to create 1 1K pixel.