diff --git a/docs/index.rst b/docs/index.rst
index 57760105f..b250d1297 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -21,26 +21,35 @@ Features
 Current Capabilities
 --------------------
 
-Currently implemented functionality in this library comprises:
+1. Data handling and simulation
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 * loading event lists from fits files of a few missions (RXTE/PCA, NuSTAR/FPM, XMM-Newton/EPIC, NICER/XTI)
 * constructing light curves from event data, various operations on light curves (e.g. addition, subtraction, joining, and truncation)
+* simulating a light curve with a given power spectrum
+* simulating a light curve from another light curve and a 1-d (time) or 2-d (time-energy) impulse response
+* simulating an event list from a given light curve _and_ with a given energy spectrum
 * Good Time Interval operations
-* power spectra in Leahy, rms normalization, absolute rms and no normalization
-* averaged power spectra
-* dynamical power spectra
+
+2. Fourier methods
+~~~~~~~~~~~~~~~~~~
+* power spectra and cross spectra in Leahy, rms normalization, absolute rms and no normalization
+* averaged power spectra and cross spectra
+* dynamical power spectra and cross spectra
 * maximum likelihood fitting of periodograms/parametric models
 * (averaged) cross spectra
 * coherence, time lags
-* cross correlation functions
-* RMS spectra and lags (time vs energy, time vs frequency); *needs testing*
+* Variability-Energy spectra, like covariance spectra and lags *needs testing*
 * covariance spectra; *needs testing*
 * bispectra; *needs testing*
 * (Bayesian) quasi-periodic oscillation searches
-* simulating a light curve with a given power spectrum
-* simulating a light curve from another light curve and a 1-d (time) or 2-d (time-energy) impulse response
-* simulating an event list from a given light curve _and_ with a given energy spectrum
+* Lomb-Scargle periodograms and cross spectra
+
+3. Other time series methods
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 * pulsar searches with Epoch Folding, :math:`Z^2_n` test
+* Gaussian Processes for QPO studies
+* cross correlation functions
 
 Future Plans
 ------------