;; This buffer is for text that is not saved, and for Lisp evaluation. ;; To create a file, visit it with C-x C-f and enter text in its buffer. ;; Immediately after invoking emacs with -Q. (setq frame (make-frame '((tool-bar-lines . 0))) ) # (list (display-monitor-attributes-list frame) (frame-geometry frame) (frame-edges frame 'outer=edges) (frame-edges frame 'native-edges) (frame-edges frame 'internal-edges)) ((((name . "VGA-1") (geometry 0 0 2048 1152) (workarea 0 38 2048 1114) (mm-size 510 287) (frames # #) (source . "Gdk"))) ((outer-position 589 . 186) (outer-size 852 . 764) (external-border-size 10 . 10) (title-bar-size 0 . 27) (menu-bar-external . t) (menu-bar-size 832 . 33) (tool-bar-external . t) (tool-bar-position . top) (tool-bar-size 0 . 0) (internal-border-width . 0)) (599 256 1431 940) (599 256 1431 940) (599 256 1431 940)) (window--dump-frame frame) nil frame pixel: 832 x 684 cols/lines: 84 x 36 units: 10 x 19 frame text pixel: 800 x 684 cols/lines: 80 x 36 tool: 0 scroll: 16/0 fringe: 16 border: 0 right: 0 bottom: 0 # parent: nil pixel left: 0 top: 0 size: 832 x 665 new: 0 char left: 0 top: 0 size: 83 x 35 new: 0 normal: 1.0 x 1.0 new: 0 body pixel: 800 x 646 char: 80 x 34 width left fringe: 8 left margin: 0 right margin: 0 width right fringe: 8 scroll-bar: 16 divider: 0 height header-line: 0 mode-line: 19 divider: 0 # parent: nil pixel left: 0 top: 665 size: 832 x 19 new: 0 char left: 0 top: 35 size: 83 x 1 new: 0 normal: 1.0 x 1.0 new: 0 body pixel: 800 x 19 char: 80 x 1 width left fringe: 8 left margin: 0 right margin: 0 width right fringe: 8 scroll-bar: 16 divider: 0 height header-line: 0 mode-line: 0 divider: 0 ;; Immediately after maximizing by clicking on the top-right +. Note that the value of frame is ;; different. frame # (list (display-monitor-attributes-list frame) (frame-geometry frame) (frame-edges frame 'outer=edges) (frame-edges frame 'native-edges) (frame-edges frame 'internal-edges)) ((((name . "VGA-1") (geometry 0 0 2048 1152) (workarea 0 38 2048 1114) (mm-size 510 287) (frames # #) (source . "Gdk"))) ((outer-position 0 . 38) (outer-size 2048 . 1114) (external-border-size 0 . 1) (title-bar-size 0 . 28) (menu-bar-external . t) (menu-bar-size 2048 . 33) (tool-bar-external . t) (tool-bar-position . top) (tool-bar-size 0 . 0) (internal-border-width . 0)) (0 100 2048 1151) (0 100 2048 1151) (0 100 2048 1151)) (window--dump-frame frame) nil frame pixel: 832 x 684 cols/lines: 84 x 36 units: 10 x 19 frame text pixel: 800 x 684 cols/lines: 80 x 36 tool: 0 scroll: 16/0 fringe: 16 border: 0 right: 0 bottom: 0 # parent: nil pixel left: 0 top: 0 size: 832 x 665 new: 0 char left: 0 top: 0 size: 83 x 35 new: 0 normal: 1.0 x 1.0 new: 0 body pixel: 800 x 646 char: 80 x 34 width left fringe: 8 left margin: 0 right margin: 0 width right fringe: 8 scroll-bar: 16 divider: 0 height header-line: 0 mode-line: 19 divider: 0 # parent: nil pixel left: 0 top: 665 size: 832 x 19 new: 0 char left: 0 top: 35 size: 83 x 1 new: 0 normal: 1.0 x 1.0 new: 0 body pixel: 800 x 19 char: 80 x 1 width left fringe: 8 left margin: 0 right margin: 0 width right fringe: 8 scroll-bar: 16 divider: 0 height header-line: 0 mode-line: 0 divider: 0 ;; Just after obtaining the information above the (real, not reported) workarea expanded to its ;; "proper" maximized size with no intentional input from me. I ran the checks again, and the ;; results are different. frame # (list (display-monitor-attributes-list frame) (frame-geometry frame) (frame-edges frame 'outer=edges) (frame-edges frame 'native-edges) (frame-edges frame 'internal-edges)) ((((name . "VGA-1") (geometry 0 0 2048 1152) (workarea 0 38 2048 1114) (mm-size 510 287) (frames # #) (source . "Gdk"))) ((outer-position 0 . 38) (outer-size 2048 . 1114) (external-border-size 0 . 1) (title-bar-size 0 . 28) (menu-bar-external . t) (menu-bar-size 2048 . 33) (tool-bar-external . t) (tool-bar-position . top) (tool-bar-size 0 . 0) (internal-border-width . 0)) (0 100 2048 1151) (0 100 2048 1151) (0 100 2048 1151)) (window--dump-frame frame) nil frame pixel: 2048 x 1051 cols/lines: 205 x 55 units: 10 x 19 frame text pixel: 2016 x 1051 cols/lines: 201 x 55 tool: 0 scroll: 16/0 fringe: 16 border: 0 right: 0 bottom: 0 # parent: nil pixel left: 0 top: 0 size: 2048 x 1032 new: 0 char left: 0 top: 0 size: 204 x 54 new: 0 normal: 1.0 x 1.0 new: 0 body pixel: 2016 x 1013 char: 201 x 53 width left fringe: 8 left margin: 0 right margin: 0 width right fringe: 8 scroll-bar: 16 divider: 0 height header-line: 0 mode-line: 19 divider: 0 # parent: nil pixel left: 0 top: 1032 size: 2048 x 19 new: 0 char left: 0 top: 54 size: 204 x 1 new: 0 normal: 1.0 x 1.0 new: 0 body pixel: 2016 x 19 char: 201 x 1 width left fringe: 8 left margin: 0 right margin: 0 width right fringe: 8 scroll-bar: 16 divider: 0 height header-line: 0 mode-line: 0 divider: 0 ;; I started a new emacs and ran (setq frame (make-frame '((tool-bar-lines . 0))) ). Then I set the ;; fullscreen parameter with results indicated below. (set-frame-parameter frame 'fullscreen 'maximized) ;; The outersize changed to fullscreen, the (real) workarea did not change in size, but it did ;; relocate to Left Top. In other words the result was very similar to a normal, problem, start. (set-frame-parameter frame 'fullscreen 'fullboth) ;; From the position above, this caused the outerframe to increase in size, eliminating the frame ;; border. The workarea moved, further Left Top, but did not change in size. (set-frame-parameter frame 'fullscreen 'fullheight) (set-frame-parameter frame 'fullscreen 'fullwidth) ;; I have never used these, so I do not know how they are intended to work. After these, the shape ;; changed to fullheight and fullwidth, respectively. The other dimension changed to the width and ;; height of the workarea and the whole outershape moved so that it was centered horizontally and ;; vertically respectively. The attached screenshot shows one of these configurations. (setq frame (make-frame '((tool-bar-lines . 0))) ) # (set-frame-parameter frame 'fullscreen 'maximized) nil (window--dump-frame frame) nil frame pixel: 832 x 684 cols/lines: 84 x 36 units: 10 x 19 frame text pixel: 800 x 684 cols/lines: 80 x 36 tool: 0 scroll: 16/0 fringe: 16 border: 0 right: 0 bottom: 0 # parent: nil pixel left: 0 top: 0 size: 832 x 665 new: 0 char left: 0 top: 0 size: 83 x 35 new: 0 normal: 1.0 x 1.0 new: 0 body pixel: 800 x 646 char: 80 x 34 width left fringe: 8 left margin: 0 right margin: 0 width right fringe: 8 scroll-bar: 16 divider: 0 height header-line: 0 mode-line: 19 divider: 0 # parent: nil pixel left: 0 top: 665 size: 832 x 19 new: 0 char left: 0 top: 35 size: 83 x 1 new: 0 normal: 1.0 x 1.0 new: 0 body pixel: 800 x 19 char: 80 x 1 width left fringe: 8 left margin: 0 right margin: 0 width right fringe: 8 scroll-bar: 16 divider: 0 height header-line: 0 mode-line: 0 divider: 0 (set-frame-parameter frame 'fullscreen 'fullboth) nil (window--dump-frame frame) nil frame pixel: 832 x 684 cols/lines: 84 x 36 units: 10 x 19 frame text pixel: 800 x 684 cols/lines: 80 x 36 tool: 0 scroll: 16/0 fringe: 16 border: 0 right: 0 bottom: 0 # parent: nil pixel left: 0 top: 0 size: 832 x 665 new: 0 char left: 0 top: 0 size: 83 x 35 new: 0 normal: 1.0 x 1.0 new: 0 body pixel: 800 x 646 char: 80 x 34 width left fringe: 8 left margin: 0 right margin: 0 width right fringe: 8 scroll-bar: 16 divider: 0 height header-line: 0 mode-line: 19 divider: 0 # parent: nil pixel left: 0 top: 665 size: 832 x 19 new: 0 char left: 0 top: 35 size: 83 x 1 new: 0 normal: 1.0 x 1.0 new: 0 body pixel: 800 x 19 char: 80 x 1 width left fringe: 8 left margin: 0 right margin: 0 width right fringe: 8 scroll-bar: 16 divider: 0 height header-line: 0 mode-line: 0 divider: 0 (set-frame-parameter frame 'fullscreen 'fullheight) nil frame pixel: 832 x 684 cols/lines: 84 x 36 units: 10 x 19 frame text pixel: 800 x 684 cols/lines: 80 x 36 tool: 0 scroll: 16/0 fringe: 16 border: 0 right: 0 bottom: 0 # parent: nil pixel left: 0 top: 0 size: 832 x 665 new: 0 char left: 0 top: 0 size: 83 x 35 new: 0 normal: 1.0 x 1.0 new: 0 body pixel: 800 x 646 char: 80 x 34 width left fringe: 8 left margin: 0 right margin: 0 width right fringe: 8 scroll-bar: 16 divider: 0 height header-line: 0 mode-line: 19 divider: 0 # parent: nil pixel left: 0 top: 665 size: 832 x 19 new: 0 char left: 0 top: 35 size: 83 x 1 new: 0 normal: 1.0 x 1.0 new: 0 body pixel: 800 x 19 char: 80 x 1 width left fringe: 8 left margin: 0 right margin: 0 width right fringe: 8 scroll-bar: 16 divider: 0 height header-line: 0 mode-line: 0 divider: 0 (set-frame-parameter frame 'fullscreen 'fullwidth) nil (window--dump-frame frame) nil frame pixel: 832 x 684 cols/lines: 84 x 36 units: 10 x 19 frame text pixel: 800 x 684 cols/lines: 80 x 36 tool: 0 scroll: 16/0 fringe: 16 border: 0 right: 0 bottom: 0 # parent: nil pixel left: 0 top: 0 size: 832 x 665 new: 0 char left: 0 top: 0 size: 83 x 35 new: 0 normal: 1.0 x 1.0 new: 0 body pixel: 800 x 646 char: 80 x 34 width left fringe: 8 left margin: 0 right margin: 0 width right fringe: 8 scroll-bar: 16 divider: 0 height header-line: 0 mode-line: 19 divider: 0 # parent: nil pixel left: 0 top: 665 size: 832 x 19 new: 0 char left: 0 top: 35 size: 83 x 1 new: 0 normal: 1.0 x 1.0 new: 0 body pixel: 800 x 19 char: 80 x 1 width left fringe: 8 left margin: 0 right margin: 0 width right fringe: 8 scroll-bar: 16 divider: 0 height header-line: 0 mode-line: 0 divider: 0