mjhjmtu

The following slide is ``jumpy'' at 2 and 4. I would like to get the equations between <2> and <4> to appear sequentially replacing one another. This is way I use only instead that onslide. However, I get a jumpy slide. How can I fix this?

PS: I saw this thread beamer: only with columns makes things move down and I tried both onslide and visible, but I couldn't make it work

documentclass[10pt,english,xcolor=usenames,dvipsnames]beamer
begindocument


beginframe[label=id1]
frametitleA non-identification result
beginitemize
item<1-> 1
beginitemize
item<2-> The equation is
 only<2>beginequation*
 x = y
 endequation*
 only<3>beginequation*x = z
 endequation*
 onslide<4->beginequation*x=textcolorredz
 endequation* 
 item<4-> yet \ 
 onslide<5->... $x = u$
enditemize
item<6-> There is a jump at 2
item<7-> and at 4
enditemize
endframe
enddocument

Some (2) tricks as ideas to use in such cases:

documentclass[10pt,english,xcolor=usenames,dvipsnames]beamer
begindocument


beginframe[label=id1]
frametitleA non-identification result
beginitemize
item<1-> 1
beginitemize
item<2-> The equation is
 onslide<2->beginequation*
 alt<2>x=yx=textcolorredz
 endequation*
 only<1-3>invisible<1-3>item .\
 only<4->item<4->yet \
 onslide<5->... $x = u$
enditemize
item<6-> There is not a jump at 2
item<7-> neither at 4
enditemize
endframe
enddocument

All you need to do is to at t to the options of the frame.

documentclass[10pt,english,xcolor=usenames,dvipsnames]beamer
begindocument


beginframe[label=id1,t]
frametitleA non-identification result
beginitemize
item<1-> 1
beginitemize
item<2-> The equation is
 only<2>beginequation*
 x = y
 endequation*
 only<3>beginequation*x = z
 endequation*
 onslide<4->beginequation*x=textcolorredz
 endequation* 
 item<4-> yet \ 
 onslide<5->... $x = u$
enditemize
item<6-> There is a jump at 2
item<7-> and at 4
enditemize
endframe
enddocument