Circos > Documentation > Tutorials > Ticks And Labels > Basics
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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

1. Tick Marks - Basics

circos.conf


<<include etc/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;hs2;hs3;hs4;hs5

<<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>>
<<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>

#chromosomes_display_default = yes
chromosomes_display_default = no

# no ticks on chromosomes hs1 and hs2
# use with chromosomes_display_default = yes
# chromosomes = -hs1;-hs2:0-100;-hs3:100-)

chromosomes          = hs1;hs2:0-100;hs3:100-)

radius               = dims(ideogram,radius_outer)
label_offset         = 5p
orientation          = out
label_multiplier     = 1e-6
color                = black

<tick>
#chromosomes    = -hs2
spacing        = 1u
size           = 8p
thickness      = 2p
color          = dgrey
show_label     = no
</tick>

<tick>
chromosomes    = hs4
spacing        = 5u
size           = 12p
color          = dred
thickness      = 2p
show_label     = yes
label_size     = 20p
label_color    = dred
label_offset   = 3p
format         = %d
</tick>

<tick>
chromosomes    = -hs2;hs5
spacing        = 10u
size           = 14p
thickness      = 2p
show_label     = yes
label_size     = 24p
label_offset   = 5p
format         = %d
</tick>

</ticks>