Circos > Documentation > Tutorials > 2d Tracks > Text 3
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Circos at the EMBO NGS workshop in Tunis, Sept 15–25.

Use the latest version of Circos and read Circos best practices—these list recent important changes and identify sources of common problems.
If you are having trouble, post your issue to the Circos Google Group and include all files and detailed error logs. Please do not email me directly unless it is urgent—you are much more likely to receive a timely reply from the group.
Don't know what question to ask? Read Points of View: Visualizing Biological Data by Bang Wong, myself and invited authors from the Points of View series.

6 — 2D Data Tracks

8. Text—Rules

circos.conf


<<include colors_fonts_patterns.conf>>

<<include ideogram.conf>>
<<include ticks.conf>>

karyotype = data/karyotype/karyotype.human.txt

<image>
<<include etc/image.conf>>
</image>

chromosomes_units = 1000
chromosomes       = hs1:0-1
chromosomes_display_default = no

<plots>

type       = text
color      = black
label_font = mono
label_size = 32
show_links = no
rpadding   = 0.2r

<plot>
file       = data/6/sequence.txt
r1         = 0.9r
r0         = 0.3r
label_size = 16
padding    = -0.25r

<rules>
<<include rule.textcolor.conf>>
</rules>

</plot>

<plot>
file       = data/6/sequence.txt
r1         = 0.9r
r0         = 0.4r
rpadding   = 0.25r

<rules>
<<include rule.textcolor.conf>>
</rules>

</plot>

<plot>
file       = data/6/sequence.long.txt
r1         = 0.9r
r0         = 0.7r

label_rotate = no

<rules>
<<include rule.textcolor.conf>>
</rules>

</plot>

<plot>
file  = data/6/sequence.txt
r0    = 1r+80p
r1    = 1r+250p

label_parallel = yes

<rules>

<rule>
condition  = var(value) ne "A"
show       = no
</rule>

<rule>
condition  = 1
label_size = eval(12+32*rand())
</rule>

</rules>

</plot>

</plots>

<<include etc/housekeeping.conf>>

bands.conf

show_bands            = yes
fill_bands            = yes
band_stroke_thickness = 2
band_stroke_color     = white
band_transparency     = 0

ideogram.conf


<ideogram>

<spacing>
default = 0.01r
break   = 0.5r
</spacing>

<<include ideogram.position.conf>>
<<include ideogram.label.conf>>
<<include bands.conf>>

radius*       = 0.825r

</ideogram>

ideogram.label.conf

show_label       = yes
label_font       = default
label_radius     = dims(image,radius)-30p
label_size       = 24
label_parallel   = yes
label_case       = lower
label_format     = eval(sprintf("chr%s",var(label)))

ideogram.position.conf

radius           = 0.775r
thickness        = 30p
fill             = yes
fill_color       = black
stroke_thickness = 2
stroke_color     = black

rule.textcolor.conf

<rule>
condition = var(value) eq "A"
color     = red
</rule>
<rule>
condition = var(value) eq "T"
color     = blue
</rule>
<rule>
condition = var(value) eq "C"
color     = green
</rule>

ticks.conf


show_ticks       = yes
show_tick_labels = yes
show_grid        = no
grid_start       = dims(ideogram,radius_inner)-0.5r
grid_end         = dims(ideogram,radius_inner)

<ticks>
radius           = dims(ideogram,radius_outer)
label_offset     = 5p
label_size       = 20p
multiplier       = 1
color            = black
format           = %d
size             = 10p
thickness        = 2p

<tick>
spacing        = 0.002u
show_label     = no
</tick>
<tick>
spacing        = .02u
show_label     = yes
</tick>
<tick>
spacing        = .1u
show_label     = yes
label_size     = 24p
</tick>

</ticks>