To get it to work we need to push “F2” for Setup (I am using Fedora 31, so could be that the keys in your distribution are different).
then, using keyboard arrows, go down to Columns in the very first column on the left.
In the second column you can see all information that is displayed at the moment. On the third column it is possible to learn, from the descriptions, what is and what could be shown.
Now, using keyboard arrows, we go to the third column and go down until its possible to “IO_READ_RATE“. When selected, push “F5” Add to add “IO_READ_RATE” to the second column. Do the same for “IO_WRITE_RATE” and “IO_RATE” and push “F10” Done.
Now the tree “new” columns are in the left side. Keep in mind that these values are not displayed if you don’t have permissions for that.
Also, another minor tip is to display the hostname when using HTOP to monitor two or more machines. To do that, again use “F2” Setup.
Go for “Hostname” in the “Available meters” column as shown in the picture above and push “Enter“.
Now “Hostname” shows up in the “Right column” and then “Esc” to leave the Setup. And now it looks like: