Circos > Documentation > Tutorials > Ticks And Labels > Label Format
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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.

4 — Tick Marks, Grids and Labels

6. Label Formats

circos.conf


<<include colors_fonts_patterns.conf>>

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

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

karyotype   = data/karyotype/karyotype.human.txt

chromosomes_units           = 1000000
chromosomes_display_default = no
chromosomes                 = hs1:0-100

<<include etc/housekeeping.conf>>

bands.conf

show_bands            = no
fill_bands            = yes
band_stroke_thickness = 2
band_stroke_color     = white
band_transparency     = 0

ideogram.conf


<ideogram>

<spacing>
default = 0.01r
break   = 2u
</spacing>

<<include ideogram.position.conf>>
<<include ideogram.label.conf>>
show_label* = no
<<include bands.conf>>

</ideogram>

ideogram.label.conf

show_label     = yes
label_font     = default
label_radius   = (dims(ideogram,radius_inner) + dims(ideogram,radius_outer))/2
label_center   = yes
label_size     = 72
label_with_tag = yes
label_parallel = yes
label_case     = upper

ideogram.position.conf

radius           = 0.90r
thickness        = 100p
fill             = no
fill_color       = black
stroke_thickness = 2
stroke_color     = black

ticks.conf


show_ticks          = yes
show_tick_labels    = yes

<ticks>

radius       = dims(ideogram,radius_outer)
multiplier   = 1/1u
label_offset = 0.4r
thickness    = 4p
size         = 20p
show_label   = yes

<tick>
spacing        = 0.25u
color          = red
label_size     = 16p
label_color    = red
format         = %df
mod            = 1u
suffix         = kb
multiplier     = 1000/1u
prefix         = +
</tick>

<tick>
spacing        = 1u
color          = green
label_color    = green
label_size     = 18p
label_offset   = 30p
format         = %.1f
mod            = 5u
suffix         = " Mb"
prefix         = +
</tick>

<tick>
spacing       = 5u
color         = blue
label_color   = blue
label_size    = 20p
label_offset  = 30p
format        = %d
mod           = 100u
suffix        = Mb
</tick>

<tick>
spacing        = 20u
label_size     = 24p
format         = %d
suffix         = " Mb"
label_offset   = 30p
</tick>

</ticks>