<div dir="ltr">Hi Cameron,<div class="gmail_extra"><br></div><div class="gmail_extra">Thanks for the reply. I tried using set_font_size function as you suggested and the coordinate ssytem as axes for the annotate_text but the fontsize is still not set the same as the rest of the slice plot (see attached plot below). The annotate_text gave an error: </div><div class="gmail_extra"><pre style="overflow:auto;padding:0px;margin-top:0px;margin-bottom:0px;line-height:17.0001px;word-wrap:break-word;color:rgb(0,0,0);border:0px;border-radius:0px;white-space:pre-wrap;vertical-align:baseline"><font size="1"><span class="" style="color:darkred">---------------------------------------------------------------------------</span>
<span class="" style="color:darkred">TypeError</span>                                 Traceback (most recent call last)
<span class="" style="color:darkgreen">//anaconda/lib/python2.7/site-packages/IPython/core/formatters.pyc</span> in <span class="" style="color:steelblue">__call__<span class="" style="color:darkblue">(self, obj)</span>
<span class="" style="color:darkgreen">    332</span>             method <span class="" style="color:rgb(196,160,0)">=</span> _safe_get_formatter_method<span class="" style="color:rgb(196,160,0)">(</span>obj<span class="" style="color:rgb(196,160,0)">,</span> self<span class="" style="color:rgb(196,160,0)">.</span>print_method<span class="" style="color:rgb(196,160,0)">)</span><span class="" style="color:rgb(196,160,0)"></span>
<span class="" style="color:darkgreen">    333</span>             <span class="" style="color:darkgreen">if</span> method <span class="" style="color:darkgreen">is</span> <span class="" style="color:darkgreen">not</span> None<span class="" style="color:rgb(196,160,0)">:</span><span class="" style="color:rgb(196,160,0)"></span>
<span class="" style="color:darkgreen">--> 334<span class="" style="color:rgb(196,160,0)">                 <span class="" style="color:darkgreen">return</span> method<span class="">(</span><span class="">)</span><span class=""></span>
<span class="" style="color:darkgreen">    335</span>             <span class="" style="color:darkgreen">return</span> None<span class=""></span>
<span class="" style="color:darkgreen">    336</span>         <span class="" style="color:darkgreen">else</span><span class="">:</span><span class=""></span>

<span class="" style="color:darkgreen">/global/homes/d/dorislee/mypythonpackages/yt/visualization/plot_container.pyc</span> in <span class="" style="color:steelblue">newfunc<span class="" style="color:darkblue">(*args, **kwargs)</span>
<span class="" style="color:darkgreen">     40</span>     <span class="" style="color:darkgreen">def</span> newfunc<span class="" style="color:rgb(196,160,0)">(</span><span class="" style="color:rgb(196,160,0)">*</span>args<span class="" style="color:rgb(196,160,0)">,</span> <span class="" style="color:rgb(196,160,0)">**</span>kwargs<span class="" style="color:rgb(196,160,0)">)</span><span class="" style="color:rgb(196,160,0)">:</span><span class="" style="color:rgb(196,160,0)"></span>
<span class="" style="color:darkgreen">     41</span>         <span class="" style="color:darkgreen">try</span><span class="" style="color:rgb(196,160,0)">:</span><span class="" style="color:rgb(196,160,0)"></span>
<span class="" style="color:darkgreen">---> 42<span class="" style="color:rgb(196,160,0)">             </span>args<span class="" style="color:rgb(196,160,0)">[</span><span class="" style="color:steelblue">0</span><span class="" style="color:rgb(196,160,0)">]</span><span class="" style="color:rgb(196,160,0)">.</span>run_callbacks<span class="" style="color:rgb(196,160,0)">(</span><span class="" style="color:rgb(196,160,0)">)</span><span class="" style="color:rgb(196,160,0)"></span>
<span class="">     43</span>         <span class="">except</span> NotImplementedError<span class="" style="color:rgb(196,160,0)">:</span><span class="" style="color:rgb(196,160,0)"></span>
<span class="">     44</span>             <span class="">pass</span><span class="" style="color:rgb(196,160,0)"></span>

<span class="">/global/homes/d/dorislee/mypythonpackages/yt/visualization/plot_container.pyc</span> in <span class="" style="color:steelblue">run_callbacks<span class="" style="color:darkblue">(self)</span>
<span class="" style="color:darkgreen">    432</span>                 cbw <span class="" style="color:rgb(196,160,0)">=</span> CallbackWrapper<span class="" style="color:rgb(196,160,0)">(</span>self<span class="" style="color:rgb(196,160,0)">,</span> self<span class="" style="color:rgb(196,160,0)">.</span>plots<span class="" style="color:rgb(196,160,0)">[</span>f<span class="" style="color:rgb(196,160,0)">]</span><span class="" style="color:rgb(196,160,0)">,</span> self<span class="" style="color:rgb(196,160,0)">.</span>frb<span class="" style="color:rgb(196,160,0)">,</span> f<span class="" style="color:rgb(196,160,0)">)</span><span class="" style="color:rgb(196,160,0)"></span>
<span class="" style="color:darkgreen">    433</span>                 CallbackMaker <span class="" style="color:rgb(196,160,0)">=</span> callback_registry<span class="" style="color:rgb(196,160,0)">[</span>name<span class="" style="color:rgb(196,160,0)">]</span><span class="" style="color:rgb(196,160,0)"></span>
<span class="" style="color:darkgreen">--> 434<span class="" style="color:rgb(196,160,0)">                 </span>callback <span class="" style="color:rgb(196,160,0)">=</span> CallbackMaker<span class="" style="color:rgb(196,160,0)">(</span><span class="" style="color:rgb(196,160,0)">*</span>args<span class="" style="color:rgb(196,160,0)">[</span><span class="" style="color:steelblue">1</span><span class="" style="color:rgb(196,160,0)">:</span><span class="" style="color:rgb(196,160,0)">]</span><span class="" style="color:rgb(196,160,0)">,</span> <span class="" style="color:rgb(196,160,0)">**</span>kwargs<span class="" style="color:rgb(196,160,0)">)</span><span class="" style="color:rgb(196,160,0)"></span>
<span class="">    435</span>                 callback<span class="" style="color:rgb(196,160,0)">(</span>cbw<span class="" style="color:rgb(196,160,0)">)</span><span class="" style="color:rgb(196,160,0)"></span>
<span class="">    436</span>             <span class="">for</span> key <span class="">in</span> self<span class="" style="color:rgb(196,160,0)">.</span>frb<span class="" style="color:rgb(196,160,0)">.</span>keys<span class="" style="color:rgb(196,160,0)">(</span><span class="" style="color:rgb(196,160,0)">)</span><span class="" style="color:rgb(196,160,0)">:</span><span class="" style="color:rgb(196,160,0)"></span>

<span class="" style="color:darkred">TypeError</span>: __init__() got an unexpected keyword argument 'coord_system'</span></span></span></span></span></span></span></font></pre></div><div class="gmail_extra">This issue still persist after I updated my yt version to latest yt 3.1 version.</div><div class="gmail_extra"><br></div></div>