This question was aked many times, so - I am just providing the link to one thread with the information about it:
How to change the volume/lot size (many posts)
https://www.mql5.com/en/forum/11714
more -
How to Select a Deal Volume (example about how to check.calculate by yourself) - post #922
more -
FAQ:

signal provider has minimal volume 0.01, subscriber has 0.10 - how to change minimal volume ????
- 2013.04.18
- www.mql5.com
In my journal, when i'm using VIACHI signal , i get this : 2013.04...

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My capital is 8 times larger than the capital that my signal provider has and all positions are copied with a volume of 0.01. The volume at the signal transmitter is also 0.01. I would like my positions to be of greater volume because I have enough capital in my account to be able to handle it. Do I need to change the settings on the signal because now I use the settings provided.
I beg you for help.
Little Count