Q:

How to disable Plank application on Ubuntu startup

I have installed Plank program on my Ubuntu Mate 16.04.
Plank logo
But after first run it always run on system startup.
I don't want to uninstall it, but I want to disable startup run.
And there is no option on Ubuntu Startup Applications that I have seen.
Can anybody explain, how to disable this application on startup?

A:

In Startup Applications, click on the application you don't want to be open at the startup then click on remove button on the right. This doesn't unistall the app, only disable the application opening on startup. In alternative you may uncheck the chekbox on the left of the application name, it works too and you can reactivate the application at startup whenever you want easily.
Edit:
if Plank doesent appear in startup application try:
 cd /etc/xdg/autostart/
 sudo sed --in-place 's/NoDisplay=true/NoDisplay=false/g' *.desktop

It should show all deamons at startup, also the system one. 
Edit2:
with MATE Tweak go to interface->pannels and in the first select you should have selected Cupertino that has plank by default, now select MATE and plank should disappear

