UI elements alignment

Shiny
1

I would like to have that button 'Save Model' to the right side, under the Model matrix.

I try below code, but not able to have it what I want. Can anyone help?

 fluidRow(
            column(3,plotOutput('Distribution_xxxDistance')),
            column(3,plotOutput('Distribution_yyyGrade')),
            br(),
            column(4,uiOutput('ModelCoeff_table')),
            #fluidRow(column(3,actionButton("button", "Save Model"))),
            column(2,h1('Model')),
            fluidRow(column(2,rHandsontableOutput("Model"))),
            fluidRow(column(2,actionButton("savemodel_button", "Save Model")))
          )
2

it is fine now, I have solved it.