This guide will show you how to enable zoom effect on plank in elementary OS. It require some compiling and some editing, so read carefully.
First you need is to download the libs to build plank with, open the terminal copy/paste;
sudo apt install libglib2.0-dev valac libgnome-menu-3-dev libxml2-dev libxml2-utils libx11-dev libwnck-3-dev libgee-0.8-dev libbamf3-dev libdbusmenu-gtk3-dev
Next is to download and unpack Plank;
cd && cd Downloads wget https://launchpad.net/ubuntu/+archive/primary/+sourcefiles/plank/0.11.89-1/plank_0.11.89.orig.tar.xz tar xf plank_0.11.89.orig.tar.xz cd plank-0.11.89
Now for compiling and installing Plank;
./configure make sudo make install
Now you have what is needed to zoom in Plank and can therefore reinstall the Plank libs.
sudo apt install --reinstall plank libplank*
Two files need to be edited before you can get the zoom effect, copy/paste;
sudo nano /usr/local/share/plank/themes/Default/dock.theme
Add the following in the end of the file;
ZoomEnabled=true ZoomPercent=150
Save: [ctrl]+[o] and Exit: [ctrl]+[x]
The last file to edit i s the schemas of Plank;
sudo nano /usr/share/glib-2.0/schemas/net.launchpad.plank.gschema.xml
Look for (near the end of the file);
<key name="zoom-enabled" type="b">
<default>false</default>
Change false to true
Save: [ctrl]+[o] and Exit: [ctrl]+[x]
Last thing;
killall plank&& plank& plank --preferences
Now enable Zoom effect in preference.
Enjoy! ^_^
Tested on: elementary OS 5.1.5
Source: https://www.reddit.com/r/elementaryos/comments/fd6fgd/zoom_effect_reveal_removed_from_the_plank/
