How to skip fragments of code in Matrix?
Your question is rather vaguely but if I'm right:

You could put an "if" statement around your "h1" element like,

{% if loop.first %}&lt;h1&gt;This text will only be used if the lightswitch is active&lt;/h1&gt;{% endif %}


Or add a field to the block. Preferably a lightswitch. Which if enabled will show the H1 tag and wont if you dont activate it.

{% if block.lightSwitch %}&lt;h1&gt;This text will only be used in the first loop&lt;/h1&gt;{% endif %}