Formatting calc sheets headers & Footers and Zero values

Linux Mint 18.1 Cinnamon 64 bit

Version: 5.1.6.2
Build ID: 1:5.1.6~rc2-0ubuntu1~xenial1
CPU Threads: 2; OS Version: Linux 4.4; UI Render: default;
Locale: en-GB (en_GB.UTF-8); Calc: group2

I have a Calc spreadsheet that has 7 different tabs. I want each sheet to have its own header and footer rather than them all being the same, as they are at present. I also want some of the sheets to display zero values while the other do not.

I want each sheet to have its own header and footer

For two sheets to have different headers and footers those two sheets each need their own page style.

I also want some of the sheets to display zero values while the other do not.

To hide zeroes, format the cells so that their number format code is 0;-0;. Read more about number format codes here.

Edit: Fixed format code. Thanks @erAck

That format code should include a minus sign in the second subformat, otherwise negative numbers are displayed without and look like positive numbers, so 0;-0;