frame .left  pack .left -side left -padx 3m -pady 3m  frame .right  pack .right -side left -padx 3m -pady 3m  foreach size {8 10 12 18 24} {          radiobutton .pts$size -variable pts \          -value $size -text "$size points"           pack .pts$size -in .left -side top -anchor w          }    checkbutton .bold -text Bold -variable bold  checkbutton .italic -text Italic -variable italic  checkbutton .underline -text Underline -variable underline    pack .bold .italic .underline -in .right -side top -anchor w
 Use additional frames to create more complex arrangements:
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