diff --git a/printer.conf.hpold.bak b/printer.conf.hpold.bak
new file mode 100644
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--- /dev/null
+++ b/printer.conf.hpold.bak
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+# ASCII Photobooth printer configuration
+# Sourced by txt2printr.sh and photobooth.py.
+
+# Is the printer loaded with A4 paper for a landscape printout? (true/false)
+# Needle/dot-matrix printers have no hardware page-rotation command: the
+# print head only scans across a fixed carriage width while the paper feeds
+# in one fixed direction, so there is no way to make the physical page
+# itself "landscape". Instead, when this is true:
+#  - txt2printr.sh rotates the ascii art 90 degrees in software before
+#    sending it to the printer (turn the printed page 90 degrees to read it)
+#  - photobooth.py sizes its live-preview viewfinder to an A4-landscape
+#    character grid instead of just following the terminal size, so what you
+#    see in the preview matches the shape of what gets printed
+PRINTER_A4=true
+#PRINTER_A4=false
+
+# Your printer's real per-page capacity in the normal (portrait, unrotated)
+# orientation, used to size the A4 viewfinder above and to know when a print
+# job already fills the page (see txt2printr.sh). Paper geometry and stated
+# pitch don't reliably predict this - measure it directly with pagetest.sh:
+#   ./pagetest.sh && PRINTER_A4=false ./txt2printr.sh pagetest.txt
+# then read off the last line number on page 1 (-> PRINTER_MAX_LINES) and
+# how many characters of the 64-wide test lines actually printed before
+# being cut off (-> PRINTER_MAX_COLS).
+PRINTER_MAX_LINES=64
+PRINTER_MAX_COLS=77
diff --git a/printer.conf.rollpaper.bak b/printer.conf.rollpaper.bak
new file mode 100644
index 0000000..dce811b
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+++ b/printer.conf.rollpaper.bak
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+# ASCII Photobooth printer configuration
+# Sourced by txt2printr.sh and photobooth.py.
+
+# Is the printer loaded with A4 paper for a landscape printout? (true/false)
+# Needle/dot-matrix printers have no hardware page-rotation command: the
+# print head only scans across a fixed carriage width while the paper feeds
+# in one fixed direction, so there is no way to make the physical page
+# itself "landscape". Instead, when this is true:
+#  - txt2printr.sh rotates the ascii art 90 degrees in software before
+#    sending it to the printer (turn the printed page 90 degrees to read it)
+#  - photobooth.py sizes its live-preview viewfinder to an A4-landscape
+#    character grid instead of just following the terminal size, so what you
+#    see in the preview matches the shape of what gets printed
+PRINTER_A4=false
+
+# Your printer's real per-page capacity in the normal (portrait, unrotated)
+# orientation, used to size the A4 viewfinder above and to know when a print
+# job already fills the page (see txt2printr.sh). Paper geometry and stated
+# pitch don't reliably predict this - measure it directly with pagetest.sh:
+#   ./pagetest.sh && PRINTER_A4=false ./txt2printr.sh pagetest.txt
+# then read off the last line number on page 1 (-> PRINTER_MAX_LINES) and
+# how many characters of the 64-wide test lines actually printed before
+# being cut off (-> PRINTER_MAX_COLS).
+#
+# Set PRINTER_MAX_LINES=0 for a roll/continuous-feed printer that has no
+# fixed page length. In that mode photobooth.py sizes captures to fill
+# PRINTER_MAX_COLS width and lets height follow the image's own aspect
+# ratio instead of cropping to a row count, and txt2printr.sh always feeds
+# the paper out at the end of a print instead of skipping the feed when a
+# page is already full (there's no page to fill).
+PRINTER_MAX_LINES=0
+PRINTER_MAX_COLS=77