How to climb with spider?

[Matus]

I tamed a spider but i don't know how to climb on it.
Which key should I press to activate climb mode?

[Mazzymotto]

Yeah I dont know how to make it climb either. I remember doing it on Xbox np when it 1st came out but, now I'm on PC and can't figure it out

[Djedaran]

I can't climb walls on a spider

[maryperk]

I just tilted the mouse upwards a little and the spider had no problems climbing my house and a big cliff near my house.

[Dewindae]

You and your spider are too fat, I got it up past half its carry weight with me riding and Charlotte went right up the wall.

[Infamous Sir Marcus]

Just the same as walking, "w" right into the wall