You can mess with your view distance, but many of them are tucked away behind line of sight obstacles. I mean, I ran past the one in Dhalmora probably five times before I finally circled around the back of the right house. I just couldnt see it from my normal route.
It's based on your view distance slider in options. The higher this is, the more framerate issues you might see, but also the further you can, well, see.
EDIT: Wait, the skyshard marker? As in from the addon? That's configurable in the addon options.
Nothing like as far as the compass marker & in my case it still does not show the column of light even when interacting with it (some of the time, since the Wrathstone DLC dropped)
Using the compass marker is the best bet, and look for the obscured area when close, behind the rocks, walls, on top of cliffs etc..
Edited by Gythral on April 1, 2019 8:12AM
“Be as a tower, that, firmly set,
Shakes not its top for any blast that blows!” Dante Alighieri, The Divine Comedy