So the rest of you don't have to click 10 times to find a setting. 
php-rgraph Line Chart - Settings Reference
==========================================

TICKMARKS STYLE VALUES

---

circle  filledcircle  endcircle  filledendcircle
square  endsquare  filledsquare  filledendsquare
diamond  enddiamond  filleddiamond  filledenddiamond
tick  halftick  endtick  cross  dot  borderedcircle
arrow  filledarrow  triangle  filledtriangle


PLUGIN-SPECIFIC

---

type                "Line"
width               "700"
height              "350"
data                "database"  or "csv"  or inline "4,8,6,3"
sql                 "SELECT label_col, value_col FROM view ORDER BY label_col ASC"
x_step              "7"            show every Nth x label (7=weekly, 14=biweekly)
trendline           "1"
trendlineColors     "#008000"
trendlineLinewidth  "2"
trendlineDashed     "1"
truncate_label      "15,..."       truncate long x labels to N chars
tooltip             "#label#<br>#val# visits"   tokens: #label# #val# #date# #time#
tooltipsEvent       "onmousemove"  or "onclick"
tooltipsEffect      "slide"        or "fade" or "expand"
log_scale           "true"
create_png          "true"
suppress_error      "true"


TITLE

---

title               "Kestrel Visits 2026"
titleBold           "1"
titleSize           "14"
titleColor          "#333"
titleSubtitle       "updated #date# at #time#"
titleSubtitleColor  "#555"
titleSubtitleSize   "10"


MARGINS

---

marginLeft          "50"     increase if Y labels are clipped
marginRight         "20"
marginTop           "30"     increase if labelsAbove are clipped
marginBottom        "80"     increase for angled x labels
marginInner         "15"     horizontal padding inside chart area


LINE
----
colors              "#4a90d9"
linewidth           "2"
filled              "true"
filledColors        "rgba(74,144,217,0.2)"
spline              "true"   smooth curves
stepped             "true"   staircase style


TICKMARKS (data point markers)

---

tickmarksStyle      "filledcircle"   see list at top
tickmarksSize       "5"
tickmarksColor      "#4a90d9"        defaults to line color
tickmarksLinewidth  "2"


LABELS ABOVE POINTS

---

labelsAbove             "1"
labelsAboveSize         "9"
labelsAboveColor        "#333"
labelsAboveBold         "true"
labelsAboveOffsety      "-5"                    negative = higher
labelsAboveOffsetx      "0"
labelsAboveBackground   "rgba(255,255,255,0.7)"
labelsAboveDecimals     "0"
labelsAboveUnitsPre     "$"
labelsAboveUnitsPost    "k"


X-AXIS

---

xaxisLabelsAngle        "45"
xaxisLabelsSize         "10"
xaxisLabelsColor        "#333"
xaxisLabelsOffsety      "2"
xaxisLabelsOffsetx      "0"
xaxisTickmarks          "true"
xaxisTickmarksCount     "12"
xaxisTickmarksLength    "3"
xaxisColor              "#999"
xaxisLinewidth          "1"
xaxisTitle              "Date"
x_step                  "7"     plugin param - show every Nth label


Y-AXIS

---

yaxisScaleMin       "0"
yaxisScaleMax       "20"
yaxisScaleDecimals  "0"
yaxisLabelsCount    "5"
yaxisLabelsSize     "10"
yaxisLabelsColor    "#333"
yaxisColor          "#999"
yaxisTitle          "Visits"
yaxisScaleUnitsPre  "$"
yaxisScaleUnitsPost "k"
yaxisPosition       "right"
yaxisScaleInvert    "true"


BACKGROUND GRID

---

backgroundGrid              "true"
backgroundGridColor         "#eee"
backgroundGridVlines        "false"
backgroundGridHlines        "true"
backgroundGridBorder        "false"
backgroundGridHlinesCount   "5"
backgroundGridVlinesCount   "10"
backgroundGridLinewidth     "1"
backgroundGridDashed        "true"
backgroundGridDotted        "true"
backgroundGridAutofit       "true"


SHADOW

---

shadow          "true"
shadowColor     "#aaa"
shadowBlur      "5"
shadowOffsetx   "2"
shadowOffsety   "2"


CROSSHAIRS

---

crosshairs          "true"
crosshairsColor     "#aaa"
crosshairsLinewidth "1"
crosshairsHline     "false"
crosshairsVline     "true"


WORKING EXAMPLE - KESTREL 2026

---

{rgraph type="Line" width="700" height="350"
title="Kestrel Nestbox Visits 2026"
titleBold="1"
titleSize="14"
titleColor="#333"
data="database"
sql="SELECT visit_date, daily_visits_count FROM daily_visits_2026 ORDER BY visit_date ASC"
marginLeft="50"
marginRight="20"
marginTop="30"
marginBottom="80"
marginInner="15"
colors="#4a90d9"
linewidth="2"
tickmarksStyle="filledcircle"
tickmarksSize="5"
labelsAbove="1"
labelsAboveSize="9"
labelsAboveColor="#333"
labelsAboveOffsety="-5"
xaxisLabelsAngle="45"
xaxisLabelsSize="10"
x_step="7"
yaxisScaleMin="0"
yaxisScaleDecimals="0"
yaxisLabelsCount="5"
backgroundGridVlines="false"
backgroundGridBorder="false"
backgroundGridHlinesCount="5"
tooltip="#label#<br>#val# visits"
tooltipsEvent="onmousemove"}cvs{/rgraph}