Bootstrap & centering [Was: Apologies: 2 questions] With apologies to the forum, I have two questions that are evading me. Please note that I'm using bootstrap 4 for the first time, so that is the basic problem. (I'm sure the problem is me not knowing how to use bootstrap.)
(1) I have tried to center a banner, but nothing seems to work. It's in a (div class="container"), and everything else in that seems to work. But inserting an image and centering it just won't work:
<img class="img-fluid pl-75 pr-75 ml-5 mr-5 w-50 h-50" src="images/29yearBanner.png" alt="Our 29th Year"/>
I've garbled the modifiers every which way, and can't get it to work. Any help would be appreciated!
(2) On another page, I have a field (div class="container-fluid whiteframe") with two columns in it. But I can't figure how to cause the container to reduce when the columns reduce to one.
<div class="container-fluid whiteframe"><div class="row"><div class="col-md-6"><img src="images/trngl&list_+notes_2019.png" alt="" width
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