fixed header add functionality of fixed headers (top menu bars) to both site front end and admin.
at front end it will be a great experience to customers.benefits at front end are as below.
1.easy to navigate to other links from menu
2.easey to search
3.easy to watch cart status - no of items and price.

at admin site it will be easiar to perform save ,delete,cancel actions for all the pages.
like say for example admin is at product page and he is at the bottom of page so he need to scroll up for adding product he may it is
easier for him to click add button. after adding product its easier to save or cancel.also easy to use left menu in admin panel.

Note: supported version of opencart are as below
===================================================
2.0.1.0
2.0.1.1
2.0.2.0
2.0.3.1
2.1.0.1
2.1.0.2
2.2.0.0
2.3.0.0
2.3.0.1
2.3.0.2

Installation
============

In the OpenCart admin backend, do the following steps:

Step 1)
Go to Extensions > Extension Installer

Step 2)
Upload the fixed-header-1-0.ocmod.zip

Step 3)
Go to Extensions > Modifications
You should see an entry for this Front and Admin Fixed Header - Menu

Step 4)
Click on the Refresh button (top right of the page)

That's it!

If during the install you get an error saying "Could not connect as ......"
while uploading this zipped extension via the Extension Installer,
you probably have the FTP support disabled from your hosting.
In that case you may try the following OpenCart Extension Installer fix first: