I know that this peak is old, but since I found a solution, I am sending it for the person coming here to find the answer. You can do this by changing the CSS style. When begging your application, itβs just for sure:
.modal-lg { width: 4000px; }
or
.modal-lg { width: 95%; }
To resize the argument size = "large" in modal or
.modal-sm { width: 40px; }
for a little. Of course, change px to resize as you want.
In your application, put the code here so that it is available for your application:
dashboardBody( tags$head(tags$style(HTML(' .modal-lg { width: 4000px; } '))),
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