Positioning and sizing of photographs

[Jedzed]

I’d be grateful for some guidance. When I post photographs from my albums, they always end up to one side of the box and aren’t as large as I’d like.
How do I enlarge the images and how do I centralise them?
Many thanks

 

[Adam&Emma]

By clicking this icon . You will then see a flashing cursor in between 2 centres. Type or enter you pic here and it will be central on the page.
Alternatively highlight something already on the page and click the centre icon
Hope this makes sense

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I honestly can't remember about sizing as I host all my pics

 

[Jedzed]

Thanks Adam. Shows how technologically inept I am!

 

[Adam&Emma]

Thanks Adam. Shows how technologically inept I am!

You're not alone..I had to ask how to do it lol.